FileDocCategorySizeDatePackage
Font.javaAPI DocJava SE 5 API86561Fri Aug 26 14:56:44 BST 2005java.awt

Font

public class Font extends Object implements Serializable
The Font class represents fonts, which are used to render text in a visible way. A font provides the information needed to map sequences of characters to sequences of glyphs and to render sequences of glyphs on Graphics and Component objects.

Characters and Glyphs

A character is a symbol that represents an item such as a letter, a digit, or punctuation in an abstract way. For example, 'g', LATIN SMALL LETTER G, is a character.

A glyph is a shape used to render a character or a sequence of characters. In simple writing systems, such as Latin, typically one glyph represents one character. In general, however, characters and glyphs do not have one-to-one correspondence. For example, the character 'á' LATIN SMALL LETTER A WITH ACUTE, can be represented by two glyphs: one for 'a' and one for '´'. On the other hand, the two-character string "fi" can be represented by a single glyph, an "fi" ligature. In complex writing systems, such as Arabic or the South and South-East Asian writing systems, the relationship between characters and glyphs can be more complicated and involve context-dependent selection of glyphs as well as glyph reordering. A font encapsulates the collection of glyphs needed to render a selected set of characters as well as the tables needed to map sequences of characters to corresponding sequences of glyphs.

Physical and Logical Fonts

The Java 2 platform distinguishes between two kinds of fonts: physical fonts and logical fonts.

Physical fonts are the actual font libraries containing glyph data and tables to map from character sequences to glyph sequences, using a font technology such as TrueType or PostScript Type 1. All implementations of the Java 2 platform must support TrueType fonts; support for other font technologies is implementation dependent. Physical fonts may use names such as Helvetica, Palatino, HonMincho, or any number of other font names. Typically, each physical font supports only a limited set of writing systems, for example, only Latin characters or only Japanese and Basic Latin. The set of available physical fonts varies between configurations. Applications that require specific fonts can bundle them and instantiate them using the {@link #createFont createFont} method.

Logical fonts are the five font families defined by the Java platform which must be supported by any Java runtime environment: Serif, SansSerif, Monospaced, Dialog, and DialogInput. These logical fonts are not actual font libraries. Instead, the logical font names are mapped to physical fonts by the Java runtime environment. The mapping is implementation and usually locale dependent, so the look and the metrics provided by them vary. Typically, each logical font name maps to several physical fonts in order to cover a large range of characters.

Peered AWT components, such as {@link Label Label} and {@link TextField TextField}, can only use logical fonts.

For a discussion of the relative advantages and disadvantages of using physical or logical fonts, see the Internationalization FAQ document.

Font Faces and Names

A Font can have many faces, such as heavy, medium, oblique, gothic and regular. All of these faces have similar typographic design.

There are three different names that you can get from a Font object. The logical font name is simply the name that was used to construct the font. The font face name, or just font name for short, is the name of a particular font face, like Helvetica Bold. The family name is the name of the font family that determines the typographic design across several faces, like Helvetica.

The Font class represents an instance of a font face from a collection of font faces that are present in the system resources of the host system. As examples, Arial Bold and Courier Bold Italic are font faces. There can be several Font objects associated with a font face, each differing in size, style, transform and font features. The {@link GraphicsEnvironment#getAllFonts() getAllFonts} method of the GraphicsEnvironment class returns an array of all font faces available in the system. These font faces are returned as Font objects with a size of 1, identity transform and default font features. These base fonts can then be used to derive new Font objects with varying sizes, styles, transforms and font features via the deriveFont methods in this class.

version
1.200, 07/20/04

Fields Summary
private Hashtable
fRequestedAttributes
A map of font attributes available in this font. Attributes include things like ligatures and glyph substitution.
private static final Map
EMPTY_MAP
private static final TransformAttribute
IDENT_TX_ATTRIBUTE
public static final int
PLAIN
The plain style constant.
public static final int
BOLD
The bold style constant. This can be combined with the other style constants (except PLAIN) for mixed styles.
public static final int
ITALIC
The italicized style constant. This can be combined with the other style constants (except PLAIN) for mixed styles.
public static final int
ROMAN_BASELINE
The baseline used in most Roman scripts when laying out text.
public static final int
CENTER_BASELINE
The baseline used in ideographic scripts like Chinese, Japanese, and Korean when laying out text.
public static final int
HANGING_BASELINE
The baseline used in Devanigiri and similar scripts when laying out text.
public static final int
TRUETYPE_FONT
Identify a font resource of type TRUETYPE. Used to specify a TrueType font resource to the {@link #createFont} method.
public static final int
TYPE1_FONT
Identify a font resource of type TYPE1. Used to specify a Type1 font resource to the {@link #createFont} method.
protected String
name
The logical name of this Font, as passed to the constructor.
protected int
style
The style of this Font, as passed to the constructor. This style can be PLAIN, BOLD, ITALIC, or BOLD+ITALIC.
protected int
size
The point size of this Font, rounded to integer.
protected float
pointSize
The point size of this Font in float.
private transient FontPeer
peer
The platform specific font information.
private transient long
pData
private transient Font2DHandle
font2DHandle
private transient int
superscript
private transient float
width
private transient boolean
createdFont
private transient double[]
matrix
private transient boolean
nonIdentityTx
private static final AffineTransform
identityTx
private static final long
serialVersionUID
private static SoftReference
cacheRef
private static final float[]
ssinfo
private int
fontSerializedDataVersion
The Font Serializable Data Form.
private static double[]
cachedMat
get the transform matrix for this font.
private transient SoftReference
flmref
public static final int
LAYOUT_LEFT_TO_RIGHT
A flag to layoutGlyphVector indicating that text is left-to-right as determined by Bidi analysis.
public static final int
LAYOUT_RIGHT_TO_LEFT
A flag to layoutGlyphVector indicating that text is right-to-left as determined by Bidi analysis.
public static final int
LAYOUT_NO_START_CONTEXT
A flag to layoutGlyphVector indicating that text in the char array before the indicated start should not be examined.
public static final int
LAYOUT_NO_LIMIT_CONTEXT
A flag to layoutGlyphVector indicating that text in the char array after the indicated limit should not be examined.
Constructors Summary
public Font(Map attributes)
Creates a new Font with the specified attributes. This Font only recognizes keys defined in {@link TextAttribute} as attributes. If attributes is null, a new Font is initialized with default attributes.

param
attributes the attributes to assign to the new Font, or null

	initFromMap(attributes);
public Font(String name, int style, int size)
Creates a new Font from the specified name, style and point size.

The font name can be a font face name or a font family name. It is used together with the style to find an appropriate font face. When a font family name is specified, the style argument is used to select the most appropriate face from the family. When a font face name is specified, the face's style and the style argument are merged to locate the best matching font from the same family. For example if face name "Arial Bold" is specified with style Font.ITALIC, the font system looks for a face in the "Arial" family that is bold and italic, and may associate the font instance with the physical font face "Arial Bold Italic". The style argument is merged with the specified face's style, not added or subtracted. This means, specifying a bold face and a bold style does not double-embolden the font, and specifying a bold face and a plain style does not lighten the font.

If no face for the requested style can be found, the font system may apply algorithmic styling to achieve the desired style. For example, if ITALIC is requested, but no italic face is available, glyphs from the plain face may be algorithmically obliqued (slanted).

Font name lookup is case insensitive, using the case folding rules of the US locale.

param
name the font name. This can be a font face name or a font family name, and may represent either a logical font or a physical font found in this GraphicsEnvironment. The family names for logical fonts are: Dialog, DialogInput, Monospaced, Serif, or SansSerif. If name is null, the logical font name of the new Font as returned by getName()is set to the name "Default".
param
style the style constant for the Font The style argument is an integer bitmask that may be PLAIN, or a bitwise union of BOLD and/or ITALIC (for example, ITALIC or BOLD|ITALIC). If the style argument does not conform to one of the expected integer bitmasks then the style is set to PLAIN.
param
size the point size of the Font
see
GraphicsEnvironment#getAllFonts
see
GraphicsEnvironment#getAvailableFontFamilyNames
since
JDK1.0

	this.name = (name != null) ? name : "Default";
	this.style = (style & ~0x03) == 0 ? style : 0;
	this.size = size;
        this.pointSize = size;
private Font(String name, int style, float sizePts)

	this.name = (name != null) ? name : "Default";
	this.style = (style & ~0x03) == 0 ? style : 0;
	this.size = (int)(sizePts + 0.5);
        this.pointSize = sizePts;
private Font(File fontFile, int fontFormat, boolean isCopy)

	this.createdFont = true;
	/* Font2D instances created by this method track their font file
	 * so that when the Font2D is GC'd it can also remove the file.
	 */
	this.font2DHandle =
	    FontManager.createFont2D(fontFile, fontFormat, isCopy).handle;
	this.name = this.font2DHandle.font2D.getFontName(Locale.getDefault());
	this.style = Font.PLAIN;
	this.size = 1;
	this.pointSize = 1f;
private Font(Map attributes, boolean created, Font2DHandle handle)

	this.createdFont = created;
	/* Fonts created from a stream will use the same font2D instance
	 * as the parent.
	 */
	if (created) {
	    this.font2DHandle = handle;
	}
	initFromMap(attributes);
Methods Summary
private static voidapplySize(float size, java.util.Map attributes)

        attributes.put(TextAttribute.SIZE, new Float(size));
private static voidapplyStyle(int style, java.util.Map attributes)

        if ((style & BOLD) != 0) {
            attributes.put(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD);
        } else {
            attributes.remove(TextAttribute.WEIGHT);
        }

        if ((style & ITALIC) != 0) {
            attributes.put(TextAttribute.POSTURE, TextAttribute.POSTURE_OBLIQUE);
        } else {
            attributes.remove(TextAttribute.POSTURE);
        }
private static voidapplyTransform(java.awt.geom.AffineTransform trans, java.util.Map attributes)



           
	if (trans == null) {
	    throw new IllegalArgumentException("transform must not be null");
	}
	if (trans.isIdentity()) {
	    attributes.remove(TextAttribute.TRANSFORM);
	} else {
	    attributes.put(TextAttribute.TRANSFORM, new TransformAttribute(trans));
	}
public booleancanDisplay(char c)
Checks if this Font has a glyph for the specified character.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the {@link #canDisplay(int)} method or canDisplayUpTo methods.

param
c the character for which a glyph is needed
return
true if this Font has a glyph for this character; false otherwise.
since
1.2

	return getFont2D().canDisplay(c);
public booleancanDisplay(int codePoint)
Checks if this Font has a glyph for the specified character.

param
codePoint the character (Unicode code point) for which a glyph is needed.
return
true if this Font has a glyph for the character; false otherwise.
throws
IllegalArgumentException if the code point is not a valid Unicode code point.
see
Character#isValidCodePoint(int)
since
1.5

	if (!Character.isValidCodePoint(codePoint)) {
	    throw new IllegalArgumentException("invalid code point: " + Integer.toHexString(codePoint));
	}
	return getFont2D().canDisplay(codePoint);
public intcanDisplayUpTo(java.lang.String str)
Indicates whether or not this Font can display a specified String. For strings with Unicode encoding, it is important to know if a particular font can display the string. This method returns an offset into the String str which is the first character this Font cannot display without using the missing glyph code. If the Font can display all characters, -1 is returned.

param
str a String object
return
an offset into str that points to the first character in str that this Font cannot display; or -1 if this Font can display all characters in str.
since
1.2

        return canDisplayUpTo(new StringCharacterIterator(str), 0,
            str.length());
public intcanDisplayUpTo(char[] text, int start, int limit)
Indicates whether or not this Font can display the characters in the specified text starting at start and ending at limit. This method is a convenience overload.

param
text the specified array of char values
param
start the specified starting offset (in chars) into the specified array of char values
param
limit the specified ending offset (in chars) into the specified array of char values
return
an offset into text that points to the first character in text that this Font cannot display; or -1 if this Font can display all characters in text.
since
1.2

	while (start < limit && canDisplay(text[start])) {
	    ++start;
	}

	return start == limit ? -1 : start;
public intcanDisplayUpTo(java.text.CharacterIterator iter, int start, int limit)
Indicates whether or not this Font can display the text specified by the iter starting at start and ending at limit.

param
iter a {@link CharacterIterator} object
param
start the specified starting offset into the specified CharacterIterator.
param
limit the specified ending offset into the specified CharacterIterator.
return
an offset into iter that points to the first character in iter that this Font cannot display; or -1 if this Font can display all characters in iter.
since
1.2

        for (char c = iter.setIndex(start);
             iter.getIndex() < limit && canDisplay(c);
             c = iter.next()) {
        }

	int result = iter.getIndex();
	return result == limit ? -1 : result;
public static java.awt.FontcreateFont(int fontFormat, java.io.InputStream fontStream)
Returns a new Font using the specified font type and input data. The new Font is created with a point size of 1 and style {@link #PLAIN PLAIN}. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features. This method does not close the {@link InputStream}.

param
fontFormat the type of the Font, which is {@link #TRUETYPE_FONT TRUETYPE_FONT} if a TrueType resource is specified. or {@link #TYPE1_FONT TYPE1_FONT} if a Type 1 resource is specified.
param
fontStream an InputStream object representing the input data for the font.
return
a new Font created with the specified font type.
throws
IllegalArgumentException if fontFormat is not TRUETYPE_FONTorTYPE1_FONT.
throws
FontFormatException if the fontStream data does not contain the required font tables for the specified format.
throws
IOException if the fontStream cannot be completely read.
since
1.3


	if (fontFormat != Font.TRUETYPE_FONT &&
	    fontFormat != Font.TYPE1_FONT) {
	    throw new IllegalArgumentException ("font format not recognized");
	}
	final InputStream fStream = fontStream;
	Object ret = java.security.AccessController.doPrivileged(
	   new java.security.PrivilegedAction() {
	      public Object run() {
		  File tFile = null;
		  try {		    
		      tFile = File.createTempFile("+~JF", ".tmp", null);
		      tFile.deleteOnExit();
		      BufferedInputStream inStream =
			  new BufferedInputStream(fStream); 
		      FileOutputStream outStream = new FileOutputStream(tFile);
		      int bytesRead = 0;
		      int bufSize = 8192;
		      byte [] buf = new byte[bufSize]; 
		      while (bytesRead != -1) {
			  bytesRead = inStream.read(buf, 0, bufSize);
			  if (bytesRead != -1) {
			      outStream.write(buf, 0, bytesRead);
			  }
		      }
		      /* don't close the input stream */
		      outStream.close();
		  } catch (IOException e) {
		      return e;
		  }
		  return tFile;
	      }
	  });

	if (ret instanceof File) {
	    return new Font((File)ret, fontFormat, true);
	} else if (ret instanceof IOException) {
	    throw (IOException)ret;
	} else {
	    throw new FontFormatException("Couldn't access font stream");
	}
public static java.awt.FontcreateFont(int fontFormat, java.io.File fontFile)
Returns a new Font using the specified font type and the specified font file. The new Font is created with a point size of 1 and style {@link #PLAIN PLAIN}. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features.

param
fontFormat the type of the Font, which is {@link #TRUETYPE_FONT TRUETYPE_FONT} if a TrueType resource is specified or {@link #TYPE1_FONT TYPE1_FONT} if a Type 1 resource is specified. So long as the returned font, or its derived fonts are referenced the implementation may continue to access fontFile to retrieve font data. Thus the results are undefined if the file is changed, or becomes inaccessible.
param
fontFile a File object representing the input data for the font.
return
a new Font created with the specified font type.
throws
IllegalArgumentException if fontFormat is not TRUETYPE_FONTorTYPE1_FONT.
throws
NullPointerException if fontFile is null.
throws
IOException if the fontFile cannot be read.
throws
FontFormatException if fontFile does not contain the required font tables for the specified format.
throws
SecurityException if the executing code does not have permission to read from the file.
since
1.5

	if (fontFormat != Font.TRUETYPE_FONT &&
	    fontFormat != Font.TYPE1_FONT) {
	    throw new IllegalArgumentException ("font format not recognized");
	}
	SecurityManager sm = System.getSecurityManager();
	if (sm != null) {
	    FilePermission filePermission =
			new FilePermission(fontFile.getPath(), "read");
	    sm.checkPermission(filePermission);
	}
	if (!fontFile.canRead()) {
	    throw new IOException("Can't read " + fontFile);
	}
	return new Font(fontFile, fontFormat, false);
public java.awt.font.GlyphVectorcreateGlyphVector(java.awt.font.FontRenderContext frc, java.lang.String str)
Creates a {@link java.awt.font.GlyphVector GlyphVector} by mapping characters to glyphs one-to-one based on the Unicode cmap in this Font. This method does no other processing besides the mapping of glyphs to characters. This means that this method is not useful for some scripts, such as Arabic, Hebrew, Thai, and Indic, that require reordering, shaping, or ligature substitution.

param
frc the specified FontRenderContext
param
str the specified String
return
a new GlyphVector created with the specified String and the specified FontRenderContext.

        return (GlyphVector)new StandardGlyphVector(this, str, frc);
public java.awt.font.GlyphVectorcreateGlyphVector(java.awt.font.FontRenderContext frc, char[] chars)
Creates a {@link java.awt.font.GlyphVector GlyphVector} by mapping characters to glyphs one-to-one based on the Unicode cmap in this Font. This method does no other processing besides the mapping of glyphs to characters. This means that this method is not useful for some scripts, such as Arabic, Hebrew, Thai, and Indic, that require reordering, shaping, or ligature substitution.

param
frc the specified FontRenderContext
param
chars the specified array of characters
return
a new GlyphVector created with the specified array of characters and the specified FontRenderContext.

        return (GlyphVector)new StandardGlyphVector(this, chars, frc);
public java.awt.font.GlyphVectorcreateGlyphVector(java.awt.font.FontRenderContext frc, java.text.CharacterIterator ci)
Creates a {@link java.awt.font.GlyphVector GlyphVector} by mapping the specified characters to glyphs one-to-one based on the Unicode cmap in this Font. This method does no other processing besides the mapping of glyphs to characters. This means that this method is not useful for some scripts, such as Arabic, Hebrew, Thai, and Indic, that require reordering, shaping, or ligature substitution.

param
frc the specified FontRenderContext
param
ci the specified CharacterIterator
return
a new GlyphVector created with the specified CharacterIterator and the specified FontRenderContext.

        return (GlyphVector)new StandardGlyphVector(this, ci, frc);
public java.awt.font.GlyphVectorcreateGlyphVector(java.awt.font.FontRenderContext frc, int[] glyphCodes)
Creates a {@link java.awt.font.GlyphVector GlyphVector} by mapping characters to glyphs one-to-one based on the Unicode cmap in this Font. This method does no other processing besides the mapping of glyphs to characters. This means that this method is not useful for some scripts, such as Arabic, Hebrew, Thai, and Indic, that require reordering, shaping, or ligature substitution.

param
frc the specified FontRenderContext
param
glyphCodes the specified integer array
return
a new GlyphVector created with the specified integer array and the specified FontRenderContext.

        return (GlyphVector)new StandardGlyphVector(this, glyphCodes, frc);
public static java.awt.Fontdecode(java.lang.String str)
Returns the Font that the str argument describes. To ensure that this method returns the desired Font, format the str parameter in one of these ways

  • fontname-style-pointsize
  • fontname-pointsize
  • fontname-style
  • fontname
  • fontname style pointsize
  • fontname pointsize
  • fontname style
  • fontname
in which style is one of the four case-insensitive strings: "PLAIN", "BOLD", "BOLDITALIC", or "ITALIC", and pointsize is a positive decimal integer representation of the point size. For example, if you want a font that is Arial, bold, with a point size of 18, you would call this method with: "Arial-BOLD-18". This is equivalent to calling the Font constructor : new Font("Arial", Font.BOLD, 18); and the values are interpreted as specified by that constructor.

A valid trailing decimal field is always interpreted as the pointsize. Therefore a fontname containing a trailing decimal value should not be used in the fontname only form.

If a style name field is not one of the valid style strings, it is interpreted as part of the font name, and the default style is used.

Only one of ' ' or '-' may be used to separate fields in the input. The identified separator is the one closest to the end of the string which separates a valid pointsize, or a valid style name from the rest of the string. Null (empty) pointsize and style fields are treated as valid fields with the default value for that field.

Some font names may include the separator characters ' ' or '-'. If str is not formed with 3 components, e.g. such that style or pointsize fields are not present in str, and fontname also contains a character determined to be the separator character then these characters where they appear as intended to be part of fontname may instead be interpreted as separators so the font name may not be properly recognised.

The default size is 12 and the default style is PLAIN. If str does not specify a valid size, the returned Font has a size of 12. If str does not specify a valid style, the returned Font has a style of PLAIN. If you do not specify a valid font name in the str argument, this method will return a font with the family name "Dialog". To determine what font family names are available on your system, use the {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method. If str is null, a new Font is returned with the family name "Dialog", a size of 12 and a PLAIN style.

param
str the name of the font, or null
return
the Font object that str describes, or a new default Font if str is null.
see
#getFamily
since
JDK1.1

	String fontName = str;
	String styleName = "";
	int fontSize = 12;
	int fontStyle = Font.PLAIN;

        if (str == null) {
            return new Font("Dialog", fontStyle, fontSize);
        }
	
	int lastHyphen = str.lastIndexOf('-");
	int lastSpace = str.lastIndexOf(' ");
	char sepChar = (lastHyphen > lastSpace) ? '-" : ' ";
	int sizeIndex = str.lastIndexOf(sepChar);
	int styleIndex = str.lastIndexOf(sepChar, sizeIndex-1);
	int strlen = str.length();

	if (sizeIndex > 0 && sizeIndex+1 < strlen) {
	    try {
		fontSize =
		    Integer.valueOf(str.substring(sizeIndex+1)).intValue();
		if (fontSize <= 0) {
		    fontSize = 12;
		}
	    } catch (NumberFormatException e) {
		/* It wasn't a valid size, if we didn't also find the
		 * start of the style string perhaps this is the style */
		styleIndex = sizeIndex;
		sizeIndex = strlen;
		if (str.charAt(sizeIndex-1) == sepChar) {
		    sizeIndex--;
		}
	    }
	}

	if (styleIndex >= 0 && styleIndex+1 < strlen) {
	    styleName = str.substring(styleIndex+1, sizeIndex);
	    styleName = styleName.toLowerCase(Locale.ENGLISH);
	    if (styleName.equals("bolditalic")) {
		fontStyle = Font.BOLD | Font.ITALIC;
	    } else if (styleName.equals("italic")) {
		fontStyle = Font.ITALIC;
	    } else if (styleName.equals("bold")) {
		fontStyle = Font.BOLD;
	    } else if (styleName.equals("plain")) {
		fontStyle = Font.PLAIN;
	    } else {
		/* this string isn't any of the expected styles, so
		 * assume its part of the font name
		 */
		styleIndex = sizeIndex;
		if (str.charAt(styleIndex-1) == sepChar) {
		    styleIndex--;
		}
	    }
	    fontName = str.substring(0, styleIndex);

	} else {
	    int fontEnd = strlen;
	    if (styleIndex > 0) {
		fontEnd = styleIndex;
	    } else if (sizeIndex > 0) {
		fontEnd = sizeIndex;
	    }
	    if (fontEnd > 0 && str.charAt(fontEnd-1) == sepChar) {
		fontEnd--;
	    }
	    fontName = str.substring(0, fontEnd);
	}

	return new Font(fontName, fontStyle, fontSize);
private sun.font.FontLineMetricsdefaultLineMetrics(java.awt.font.FontRenderContext frc)

        FontLineMetrics flm = null;
        if (flmref == null
            || (flm = (FontLineMetrics)flmref.get()) == null
            || !flm.frc.equals(frc)) {
            
            /* The device transform in the frc is not used in obtaining line
             * metrics, although it probably should be: REMIND find why not?
             * The font transform is used but its applied in getFontMetrics, so
             * just pass identity here
             */
            float [] metrics = new float[4];
            getFont2D().getFontMetrics(this, identityTx,
                                       frc.isAntiAliased(),
                                       frc.usesFractionalMetrics(),
                                       metrics);
            float ascent  = metrics[0];
            float descent = metrics[1];
            float leading = metrics[2];
            float ssOffset = 0;
            if (superscript != 0) {
                ssOffset = (float)getTransform().getTranslateY();
                ascent -= ssOffset;
                descent += ssOffset;
            }
            float height = ascent + descent + leading;

            int baselineIndex = 0; // need real index, assumes roman for everything
            float[] baselineOffsets = { 0, (descent/2f - ascent) / 2f, -ascent }; // need real baselines eventually

            // !!! desperately need real data here
            float strikethroughOffset = ssOffset -(metrics[0] / 2.5f);
            float strikethroughThickness  = (float)(Math.log(pointSize / 4));

            float underlineOffset = ssOffset + strikethroughThickness / 1.5f;
            float underlineThickness = strikethroughThickness;

            float italicAngle = getItalicAngle();

            CoreMetrics cm = new CoreMetrics(ascent, descent, leading, height,
                                             baselineIndex, baselineOffsets,
                                             strikethroughOffset, strikethroughThickness,
                                             underlineOffset, underlineThickness,
                                             ssOffset, italicAngle);

            flm = new FontLineMetrics(0, cm, frc);
            flmref = new SoftReference(flm);
        }

        return (FontLineMetrics)flm.clone();
public java.awt.FontderiveFont(int style, float size)
Creates a new Font object by replicating this Font object and applying a new style and size.

param
style the style for the new Font
param
size the size for the new Font
return
a new Font object.
since
1.2

	Hashtable newAttributes = (Hashtable)getRequestedAttributes().clone();
	applyStyle(style, newAttributes);
	applySize(size, newAttributes);
        return new Font(newAttributes, createdFont, font2DHandle);
public java.awt.FontderiveFont(int style, java.awt.geom.AffineTransform trans)
Creates a new Font object by replicating this Font object and applying a new style and transform.

param
style the style for the new Font
param
trans the AffineTransform associated with the new Font
return
a new Font object.
throws
IllegalArgumentException if trans is null
since
1.2

	Hashtable newAttributes = (Hashtable)getRequestedAttributes().clone();
	applyStyle(style, newAttributes);
	applyTransform(trans, newAttributes);
        return new Font(newAttributes, createdFont, font2DHandle);
public java.awt.FontderiveFont(float size)
Creates a new Font object by replicating the current Font object and applying a new size to it.

param
size the size for the new Font.
return
a new Font object.
since
1.2

	Hashtable newAttributes = (Hashtable)getRequestedAttributes().clone();
	applySize(size, newAttributes);
        return new Font(newAttributes, createdFont, font2DHandle);
public java.awt.FontderiveFont(java.awt.geom.AffineTransform trans)
Creates a new Font object by replicating the current Font object and applying a new transform to it.

param
trans the AffineTransform associated with the new Font
return
a new Font object.
throws
IllegalArgumentException if trans is null
since
1.2

	Hashtable newAttributes = (Hashtable)getRequestedAttributes().clone();
	applyTransform(trans, newAttributes);
        return new Font(newAttributes, createdFont, font2DHandle);
public java.awt.FontderiveFont(int style)
Creates a new Font object by replicating the current Font object and applying a new style to it.

param
style the style for the new Font
return
a new Font object.
since
1.2

	Hashtable newAttributes = (Hashtable)getRequestedAttributes().clone();
	applyStyle(style, newAttributes);
        return new Font(newAttributes, createdFont, font2DHandle);
public java.awt.FontderiveFont(java.util.Map attributes)
Creates a new Font object by replicating the current Font object and applying a new set of font attributes to it.

param
attributes a map of attributes enabled for the new Font
return
a new Font object.
since
1.2

	if (attributes == null || attributes.size() == 0) {
	    return this;
	}

        Hashtable newAttrs = new Hashtable(getAttributes());
	Attribute validAttribs[] = getAvailableAttributes();
	Object obj;

	for(int i = 0; i < validAttribs.length; i++){
	  if ((obj = attributes.get(validAttribs[i])) != null) {
	    newAttrs.put(validAttribs[i],obj);
	  } 
	}
        return new Font(newAttrs, createdFont, font2DHandle);
public booleanequals(java.lang.Object obj)
Compares this Font object to the specified Object.

param
obj the Object to compare
return
true if the objects are the same or if the argument is a Font object describing the same font as this object; false otherwise.
since
JDK1.0

        if (obj == this) {
	    return true;
        }

	if (obj != null) {
	  try {
	    Font font = (Font)obj;
	    if ((size == font.size) &&
		(pointSize == font.pointSize) &&
		(style == font.style) &&
                (superscript == font.superscript) &&
                (width == font.width) &&
		name.equals(font.name)) {
		
		double[] thismat = this.getMatrix();
		double[] thatmat = font.getMatrix();
	    
		return thismat[0] == thatmat[0]
		    && thismat[1] == thatmat[1]
		    && thismat[2] == thatmat[2]
		    && thismat[3] == thatmat[3]
		    && thismat[4] == thatmat[4]
		    && thismat[5] == thatmat[5];
	    }
	  }
	  catch (ClassCastException e) {
	  }
	}
	return false;
protected voidfinalize()
Disposes the native Font object.

        if (this.peer != null) {
            pDispose();
        }
        super.finalize();
private static java.awt.Fontget(java.awt.Font$Key key)

         
	Font f = null;
	Map cache = (Map)cacheRef.get();
	if (cache == null) {
	    cache = new HashMap();
	    cacheRef = new SoftReference(cache);
	} else {
	    f = (Font)cache.get(key);
	}

	if (f == null) {
	    f = new Font(key.attrs);
	    cache.put(key, f);
	}

	return f;
public java.util.MapgetAttributes()
Returns a map of font attributes available in this Font. Attributes include things like ligatures and glyph substitution.

return
the attributes map of this Font.

        return (Map<TextAttribute,?>)getRequestedAttributes().clone();
public java.text.AttributedCharacterIterator.Attribute[]getAvailableAttributes()
Returns the keys of all the attributes supported by this Font. These attributes can be used to derive other fonts.

return
an array containing the keys of all the attributes supported by this Font.
since
1.2

        Attribute attributes[] = {
            TextAttribute.FAMILY,
            TextAttribute.WEIGHT,
            TextAttribute.POSTURE,
            TextAttribute.SIZE,
	    TextAttribute.TRANSFORM,
            TextAttribute.SUPERSCRIPT,
            TextAttribute.WIDTH,
        };

        return attributes;
public bytegetBaselineFor(char c)
Returns the baseline appropriate for displaying this character.

Large fonts can support different writing systems, and each system can use a different baseline. The character argument determines the writing system to use. Clients should not assume all characters use the same baseline.

param
c a character used to identify the writing system
return
the baseline appropriate for the specified character.
see
LineMetrics#getBaselineOffsets
see
#ROMAN_BASELINE
see
#CENTER_BASELINE
see
#HANGING_BASELINE
since
1.2

	return getFont2D().getBaselineFor(c);
public java.lang.StringgetFamily()
Returns the family name of this Font.

The family name of a font is font specific. Two fonts such as Helvetica Italic and Helvetica Bold have the same family name, Helvetica, whereas their font face names are Helvetica Bold and Helvetica Italic. The list of available family names may be obtained by using the {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method.

Use getName to get the logical name of the font. Use getFontName to get the font face name of the font.

return
a String that is the family name of this Font.
see
#getName
see
#getFontName
since
JDK1.1


                                                                                                     		            
       
	return getFamily_NoClientCode();
public java.lang.StringgetFamily(java.util.Locale l)
Returns the family name of this Font, localized for the specified locale.

The family name of a font is font specific. Two fonts such as Helvetica Italic and Helvetica Bold have the same family name, Helvetica, whereas their font face names are Helvetica Bold and Helvetica Italic. The list of available family names may be obtained by using the {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method.

Use getFontName to get the font face name of the font.

param
l locale for which to get the family name
return
a String representing the family name of the font, localized for the specified locale.
see
#getFontName
see
java.util.Locale
since
1.2

        if (l == null) {
            throw new NullPointerException("null locale doesn't mean default");
        }
	return getFont2D().getFamilyName(l);
final java.lang.StringgetFamily_NoClientCode()

      return getFamily(Locale.getDefault());
public static java.awt.FontgetFont(java.util.Map attributes)
Returns a Font appropriate to this attribute set.

param
attributes the attributes to assign to the new Font
return
a new Font created with the specified attributes
since
1.2
see
java.awt.font.TextAttribute

        Font font = (Font)attributes.get(TextAttribute.FONT);
        if (font != null) {
            return font;
        }

	return get(new Key(attributes));
public static java.awt.FontgetFont(java.lang.String nm)
Returns a Font object from the system properties list. nm is treated as the name of a system property to be obtained. The String value of this property is then interpreted as a Font object according to the specification of Font.decode(String) If the specified property is not found, null is returned instead.

param
nm the property name
return
a Font object that the property name describes, or null if no such property exists.
throws
NullPointerException if nm is null.
since
1.2
see
#decode(String)

	return getFont(nm, null);
public static java.awt.FontgetFont(java.lang.String nm, java.awt.Font font)
Gets the specified Font from the system properties list. As in the getProperty method of System, the first argument is treated as the name of a system property to be obtained. The String value of this property is then interpreted as a Font object.

The property value should be one of the forms accepted by Font.decode(String) If the specified property is not found, the font argument is returned instead.

param
nm the case-insensitive property name
param
font a default Font to return if property nm is not defined
return
the Font value of the property.
throws
NullPointerException if nm is null.
see
#decode(String)

	String str = null;
	try {
	    str =System.getProperty(nm);
	} catch(SecurityException e) {
	}
	if (str == null) {
	    return font;
	}
	return decode ( str );
private sun.font.Font2DgetFont2D()

	if (FontManager.usingPerAppContextComposites &&
	    font2DHandle != null &&
	    font2DHandle.font2D instanceof sun.font.CompositeFont &&
	    ((sun.font.CompositeFont)(font2DHandle.font2D)).isStdComposite()) {
	    return FontManager.findFont2D(name, style,
					  FontManager.LOGICAL_FALLBACK);
	} else if (font2DHandle == null) {
	    font2DHandle =
		FontManager.findFont2D(name, style,
				       FontManager.LOGICAL_FALLBACK).handle;
	}
	/* Do not cache the de-referenced font2D. It must be explicitly
	 * de-referenced to pick up a valid font in the event that the
	 * original one is marked invalid
	 */
	return font2DHandle.font2D;
public java.lang.StringgetFontName()
Returns the font face name of this Font. For example, Helvetica Bold could be returned as a font face name. Use getFamily to get the family name of the font. Use getName to get the logical name of the font.

return
a String representing the font face name of this Font.
see
#getFamily
see
#getName
since
1.2

      return getFontName(Locale.getDefault());
public java.lang.StringgetFontName(java.util.Locale l)
Returns the font face name of the Font, localized for the specified locale. For example, Helvetica Fett could be returned as the font face name. Use getFamily to get the family name of the font.

param
l a locale for which to get the font face name
return
a String representing the font face name, localized for the specified locale.
see
#getFamily
see
java.util.Locale

        if (l == null) {
            throw new NullPointerException("null locale doesn't mean default");
        }
	return getFont2D().getFontName(l);
public floatgetItalicAngle()
Returns the italic angle of this Font. The italic angle is the inverse slope of the caret which best matches the posture of this Font.

see
TextAttribute#POSTURE
return
the angle of the ITALIC style of this Font.

	AffineTransform at = (isTransformed()) ? getTransform() : identityTx;
	return getFont2D().getItalicAngle(this, at, false, false);
public java.awt.font.LineMetricsgetLineMetrics(java.lang.String str, java.awt.font.FontRenderContext frc)
Returns a {@link LineMetrics} object created with the specified String and {@link FontRenderContext}.

param
str the specified String
param
frc the specified FontRenderContext
return
a LineMetrics object created with the specified String and {@link FontRenderContext}.

        FontLineMetrics flm = defaultLineMetrics(frc);
        flm.numchars = str.length();
        return flm;
public java.awt.font.LineMetricsgetLineMetrics(java.lang.String str, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns a LineMetrics object created with the specified arguments.

param
str the specified String
param
beginIndex the initial offset of str
param
limit the end offset of str
param
frc the specified FontRenderContext
return
a LineMetrics object created with the specified arguments.

        FontLineMetrics flm = defaultLineMetrics(frc);
        int numChars = limit - beginIndex;
        flm.numchars = (numChars < 0)? 0: numChars;
        return flm;
public java.awt.font.LineMetricsgetLineMetrics(char[] chars, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns a LineMetrics object created with the specified arguments.

param
chars an array of characters
param
beginIndex the initial offset of chars
param
limit the end offset of chars
param
frc the specified FontRenderContext
return
a LineMetrics object created with the specified arguments.

        FontLineMetrics flm = defaultLineMetrics(frc);
        int numChars = limit - beginIndex;
        flm.numchars = (numChars < 0)? 0: numChars;
        return flm;
public java.awt.font.LineMetricsgetLineMetrics(java.text.CharacterIterator ci, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns a LineMetrics object created with the specified arguments.

param
ci the specified CharacterIterator
param
beginIndex the initial offset in ci
param
limit the end offset of ci
param
frc the specified FontRenderContext
return
a LineMetrics object created with the specified arguments.

        FontLineMetrics flm = defaultLineMetrics(frc);
        int numChars = limit - beginIndex;
        flm.numchars = (numChars < 0)? 0: numChars;
        return flm;
private double[]getMatrix()

        if (matrix == null) {
	    double ptSize = this.getSize2D();
	    if (nonIdentityTx) {
		AffineTransform tx = getTransform();
		tx.scale(ptSize, ptSize);
		tx.getMatrix(matrix = new double[6]);
	    } else {
		synchronized (Font.class) {
		    double[] m = cachedMat;
		    if (m == null || m[0] != ptSize) {
			cachedMat = m =
			    new double[] {ptSize, 0, 0, ptSize, 0, 0 };
		    }
		    matrix = m;
		}
	    }
        }
	return matrix;
public java.awt.geom.Rectangle2DgetMaxCharBounds(java.awt.font.FontRenderContext frc)
Returns the bounds for the character with the maximum bounds as defined in the specified FontRenderContext.

param
frc the specified FontRenderContext
return
a Rectangle2D that is the bounding box for the character with the maximum bounds.

        float [] metrics = new float[4]; 

	getFont2D().getFontMetrics(this, frc, metrics);

        return new Rectangle2D.Float(0, -metrics[0],
                                metrics[3],
                                metrics[0] + metrics[1] + metrics[2]);
public intgetMissingGlyphCode()
Returns the glyphCode which is used when this Font does not have a glyph for a specified unicode.

return
the glyphCode of this Font.
since
1.2

	return getFont2D().getMissingGlyphCode();
public java.lang.StringgetName()
Returns the logical name of this Font. Use getFamily to get the family name of the font. Use getFontName to get the font face name of the font.

return
a String representing the logical name of this Font.
see
#getFamily
see
#getFontName
since
JDK1.0

	return name;
public intgetNumGlyphs()
Returns the number of glyphs in this Font. Glyph codes for this Font range from 0 to getNumGlyphs() - 1.

return
the number of glyphs in this Font.
since
1.2

	return  getFont2D().getNumGlyphs();
public java.lang.StringgetPSName()
Returns the postscript name of this Font. Use getFamily to get the family name of the font. Use getFontName to get the font face name of the font.

return
a String representing the postscript name of this Font.
since
1.2

	return getFont2D().getPostscriptName();
public java.awt.peer.FontPeergetPeer()
Gets the peer of this Font.

return
the peer of the Font.
since
JDK1.1
deprecated
Font rendering is now platform independent.


                               
    
      
	return getPeer_NoClientCode();
final java.awt.peer.FontPeergetPeer_NoClientCode()

        if(peer == null) {
            Toolkit tk = Toolkit.getDefaultToolkit();
            this.peer = tk.getFontPeer(name, style);
        }
        return peer;
private java.util.HashtablegetRequestedAttributes()

	if (fRequestedAttributes == null) {
	    fRequestedAttributes = new Hashtable(7, (float)0.9);
            fRequestedAttributes.put(TextAttribute.TRANSFORM,
				     IDENT_TX_ATTRIBUTE);
            fRequestedAttributes.put(TextAttribute.FAMILY, name);
            fRequestedAttributes.put(TextAttribute.SIZE, new Float(size));
	    fRequestedAttributes.put(TextAttribute.WEIGHT,
				     (style & BOLD) != 0 ? 
				     TextAttribute.WEIGHT_BOLD :
				     TextAttribute.WEIGHT_REGULAR);
	    fRequestedAttributes.put(TextAttribute.POSTURE,
				     (style & ITALIC) != 0 ? 
				     TextAttribute.POSTURE_OBLIQUE :
				     TextAttribute.POSTURE_REGULAR);
            fRequestedAttributes.put(TextAttribute.SUPERSCRIPT,
                                     new Integer(superscript));
            fRequestedAttributes.put(TextAttribute.WIDTH,
                                     new Float(width));
	}
	return fRequestedAttributes;
public intgetSize()
Returns the point size of this Font, rounded to an integer. Most users are familiar with the idea of using point size to specify the size of glyphs in a font. This point size defines a measurement between the baseline of one line to the baseline of the following line in a single spaced text document. The point size is based on typographic points, approximately 1/72 of an inch.

The Java(tm)2D API adopts the convention that one point is equivalent to one unit in user coordinates. When using a normalized transform for converting user space coordinates to device space coordinates 72 user space units equal 1 inch in device space. In this case one point is 1/72 of an inch.

return
the point size of this Font in 1/72 of an inch units.
see
#getSize2D
see
GraphicsConfiguration#getDefaultTransform
see
GraphicsConfiguration#getNormalizingTransform
since
JDK1.0

	return size;
public floatgetSize2D()
Returns the point size of this Font in float value.

return
the point size of this Font as a float value.
see
#getSize
since
1.2

	return pointSize;
public java.awt.geom.Rectangle2DgetStringBounds(java.lang.String str, java.awt.font.FontRenderContext frc)
Returns the logical bounds of the specified String in the specified FontRenderContext. The logical bounds contains the origin, ascent, advance, and height, which includes the leading. The logical bounds does not always enclose all the text. For example, in some languages and in some fonts, accent marks can be positioned above the ascent or below the descent. To obtain a visual bounding box, which encloses all the text, use the {@link TextLayout#getBounds() getBounds} method of TextLayout.

param
str the specified String
param
frc the specified FontRenderContext
return
a {@link Rectangle2D} that is the bounding box of the specified String in the specified FontRenderContext.
see
FontRenderContext
see
Font#createGlyphVector
since
1.2

      char[] array = str.toCharArray();
      return getStringBounds(array, 0, array.length, frc);
public java.awt.geom.Rectangle2DgetStringBounds(java.lang.String str, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns the logical bounds of the specified String in the specified FontRenderContext. The logical bounds contains the origin, ascent, advance, and height, which includes the leading. The logical bounds does not always enclose all the text. For example, in some languages and in some fonts, accent marks can be positioned above the ascent or below the descent. To obtain a visual bounding box, which encloses all the text, use the {@link TextLayout#getBounds() getBounds} method of TextLayout.

param
str the specified String
param
beginIndex the initial offset of str
param
limit the end offset of str
param
frc the specified FontRenderContext
return
a Rectangle2D that is the bounding box of the specified String in the specified FontRenderContext.
throws
IndexOutOfBoundsException if beginIndex is less than zero, or limit is greater than the length of str, or beginIndex is greater than limit.
see
FontRenderContext
see
Font#createGlyphVector
since
1.2

      String substr = str.substring(beginIndex, limit);
      return getStringBounds(substr, frc);
public java.awt.geom.Rectangle2DgetStringBounds(char[] chars, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns the logical bounds of the specified array of characters in the specified FontRenderContext. The logical bounds contains the origin, ascent, advance, and height, which includes the leading. The logical bounds does not always enclose all the text. For example, in some languages and in some fonts, accent marks can be positioned above the ascent or below the descent. To obtain a visual bounding box, which encloses all the text, use the {@link TextLayout#getBounds() getBounds} method of TextLayout.

param
chars an array of characters
param
beginIndex the initial offset in the array of characters
param
limit the end offset in the array of characters
param
frc the specified FontRenderContext
return
a Rectangle2D that is the bounding box of the specified array of characters in the specified FontRenderContext.
throws
IndexOutOfBoundsException if beginIndex is less than zero, or limit is greater than the length of chars, or beginIndex is greater than limit.
see
FontRenderContext
see
Font#createGlyphVector
since
1.2

      if (beginIndex < 0) {
	throw new IndexOutOfBoundsException("beginIndex: " + beginIndex);
      } 
      if (limit > chars.length) {
	throw new IndexOutOfBoundsException("limit: " + limit);
      }
      if (beginIndex > limit) {
	throw new IndexOutOfBoundsException("range length: " + (limit - beginIndex));
      }

      // this code should be in textlayout
      // quick check for simple text, assume GV ok to use if simple

      boolean simple = true;
      for (int i = beginIndex; i < limit; ++i) {
	char c = chars[i];
	if (c >= '\u0590" && c <= '\u206f") {
	  simple = false;
	  break;
	}
      }
      if (simple) {
	GlyphVector gv = new StandardGlyphVector(this, chars, beginIndex, limit - beginIndex, frc);
	return gv.getLogicalBounds();
      } else {
	// need char array constructor on textlayout
	String str = new String(chars, beginIndex, limit - beginIndex);
	TextLayout tl = new TextLayout(str, this, frc);
	return new Rectangle2D.Float(0, -tl.getAscent(), tl.getAdvance(), tl.getDescent() + tl.getLeading());
      }
public java.awt.geom.Rectangle2DgetStringBounds(java.text.CharacterIterator ci, int beginIndex, int limit, java.awt.font.FontRenderContext frc)
Returns the logical bounds of the characters indexed in the specified {@link CharacterIterator} in the specified FontRenderContext. The logical bounds contains the origin, ascent, advance, and height, which includes the leading. The logical bounds does not always enclose all the text. For example, in some languages and in some fonts, accent marks can be positioned above the ascent or below the descent. To obtain a visual bounding box, which encloses all the text, use the {@link TextLayout#getBounds() getBounds} method of TextLayout.

param
ci the specified CharacterIterator
param
beginIndex the initial offset in ci
param
limit the end offset in ci
param
frc the specified FontRenderContext
return
a Rectangle2D that is the bounding box of the characters indexed in the specified CharacterIterator in the specified FontRenderContext.
see
FontRenderContext
see
Font#createGlyphVector
since
1.2
throws
IndexOutOfBoundsException if beginIndex is less than the start index of ci, or limit is greater than the end index of ci, or beginIndex is greater than limit

      int start = ci.getBeginIndex();
      int end = ci.getEndIndex();

      if (beginIndex < start) {
	throw new IndexOutOfBoundsException("beginIndex: " + beginIndex);
      } 
      if (limit > end) {
	throw new IndexOutOfBoundsException("limit: " + limit);
      }
      if (beginIndex > limit) {
	throw new IndexOutOfBoundsException("range length: " + (limit - beginIndex));
      }

      char[]  arr = new char[limit - beginIndex];

      ci.setIndex(beginIndex);
      for(int idx = 0; idx < arr.length; idx++) {
	arr[idx] = ci.current();
	ci.next();
      }

      return getStringBounds(arr,0,arr.length,frc);
public intgetStyle()
Returns the style of this Font. The style can be PLAIN, BOLD, ITALIC, or BOLD+ITALIC.

return
the style of this Font
see
#isPlain
see
#isBold
see
#isItalic
since
JDK1.0

	return style;
public java.awt.geom.AffineTransformgetTransform()
Returns a copy of the transform associated with this Font.

return
an {@link AffineTransform} object representing the transform attribute of this Font object.

	/* The most common case is the identity transform.  Most callers 
	 * should call isTransformed() first, to decide if they need to
	 * get the transform, but some may not.  Here we check to see
	 * if we have a nonidentity transform, and only do the work to
	 * fetch and/or compute it if so, otherwise we return a new
	 * identity transform.
	 *
	 * Note that the transform is _not_ necessarily the same as 
	 * the transform passed in as an Attribute in a Map, as the
	 * transform returned will also reflect the effects of WIDTH and
	 * SUPERSCRIPT attributes.  Clients who want the actual transform
	 * need to call getRequestedAttributes.
	 */
	if (nonIdentityTx) {
            AffineTransform at = null;
	    Object obj = getRequestedAttributes().get(TextAttribute.TRANSFORM);
	    if (obj != null) {
		if( obj instanceof TransformAttribute ){
		    at = ((TransformAttribute)obj).getTransform();
		}
		else {
		    if ( obj instanceof AffineTransform){
			at = new AffineTransform((AffineTransform)obj);
		    }
		}
	    } else {
                at = new AffineTransform();
            }
            
            if (superscript != 0) {
                // can't get ascent and descent here, recursive call to this fn, so use pointsize
                // let users combine super- and sub-scripting
                double trans = 0;
                int n = 0;
                boolean up = superscript > 0;
                int sign = up ? -1 : 1;
                int ss = up ? superscript : -superscript;

                while ((ss & 7) > n) {
                    int newn = ss & 7;
                    trans += sign * (ssinfo[newn] - ssinfo[n]);
                    ss >>= 3;
                    sign = -sign;
                    n = newn;
                }
                trans *= pointSize;
                double scale = Math.pow(2./3., n);

                at.preConcatenate(AffineTransform.getTranslateInstance(0, trans));
                at.scale(scale, scale);

                // note on placement and italics
                // We preconcatenate the transform because we don't want to translate along
                // the italic angle, but purely perpendicular to the baseline.  While this
                // looks ok for superscripts, it can lead subscripts to stack on each other
                // and bring the following text too close.  The way we deal with potential
                // collisions that can occur in the case of italics is by adjusting the
                // horizontal spacing of the adjacent glyphvectors.  Examine the italic
                // angle of both vectors, if one is non-zero, compute the minimum ascent
                // and descent, and then the x position at each for each vector along its
                // italic angle starting from its (offset) baseline.  Compute the difference
                // between the x positions and use the maximum difference to adjust the
                // position of the right gv.
            }

            if (width != 1f) {
                at.scale(width, 1f);
            }

            return at;
        }

        return new AffineTransform();
public booleanhasUniformLineMetrics()
Checks whether or not this Font has uniform line metrics. A logical Font might be a composite font, which means that it is composed of different physical fonts to cover different code ranges. Each of these fonts might have different LineMetrics. If the logical Font is a single font then the metrics would be uniform.

return
true if this Font has uniform line metrics; false otherwise.

        return false;   // REMIND always safe, but prevents caller optimize
public inthashCode()
Returns a hashcode for this Font.

return
a hashcode value for this Font.
since
JDK1.0

	return name.hashCode() ^ style ^ size;
private voidinitFromMap(java.util.Map attributes)

	this.name = "Dialog";
        this.pointSize = 12;
        this.size = 12;

        if((attributes != null) &&
           (!attributes.equals(EMPTY_MAP)))
        {
            Object obj;
            fRequestedAttributes = new Hashtable(attributes);
            if ((obj = attributes.get(TextAttribute.FAMILY)) != null) {
                this.name = (String)obj;
            }

            if ((obj = attributes.get(TextAttribute.WEIGHT)) != null) {
                if(obj.equals(TextAttribute.WEIGHT_BOLD)) {
                    this.style |= BOLD;
                }
            }

            if ((obj = attributes.get(TextAttribute.POSTURE)) != null) {
                if(obj.equals(TextAttribute.POSTURE_OBLIQUE)) {
                    this.style |= ITALIC;
                }
            }

            if ((obj = attributes.get(TextAttribute.SIZE)) != null) {
                this.pointSize = ((Float)obj).floatValue();
                this.size = (int)(this.pointSize + 0.5);
            }

            if ((obj = attributes.get(TextAttribute.TRANSFORM)) != null) {
		if (obj instanceof TransformAttribute) {
		    nonIdentityTx = !((TransformAttribute)obj).isIdentity();
		} else if (obj instanceof AffineTransform) {
		    nonIdentityTx = !((AffineTransform)obj).isIdentity();
		}
	    }

            if ((obj = attributes.get(TextAttribute.SUPERSCRIPT)) != null) {
                if (obj instanceof Integer) {
                    superscript = ((Integer)obj).intValue();
                    nonIdentityTx |= superscript != 0;
                }
            }

            if ((obj = attributes.get(TextAttribute.WIDTH)) != null) {
                if (obj instanceof Float) {
                    width = ((Float)obj).floatValue();
                    nonIdentityTx |= width != 1;
                }
            }
        }
private static native voidinitIDs()

private voidinitializeFont(java.util.Hashtable attributes)
        if (attributes != null) {
	    Object obj = attributes.get(TextAttribute.TRANSFORM);
	    if (obj instanceof TransformAttribute) {
		nonIdentityTx = !((TransformAttribute)obj).isIdentity();
	    } else if (obj instanceof AffineTransform) {
		nonIdentityTx = !((AffineTransform)obj).isIdentity();
	    }

            obj = attributes.get(TextAttribute.SUPERSCRIPT);
            if (obj instanceof Integer) {
                superscript = ((Integer)obj).intValue();

                // !!! always synthesize superscript
                nonIdentityTx |= superscript != 0;
            }

            obj = attributes.get(TextAttribute.WIDTH);
            if (obj instanceof Integer) {
                width = ((Float)obj).floatValue();

                // !!! always synthesize width
                nonIdentityTx |= width != 1;
            }
        }
    
public booleanisBold()
Indicates whether or not this Font object's style is
BOLD.
return
true if this Font object's
style is BOLD;
false otherwise.
see
java.awt.Font#getStyle
since
JDK1.0
	return (style & BOLD) != 0;
    
public booleanisItalic()
Indicates whether or not this Font object's style is
ITALIC.
return
true if this Font object's
style is ITALIC;
false otherwise.
see
java.awt.Font#getStyle
since
JDK1.0
	return (style & ITALIC) != 0;
    
public booleanisPlain()
Indicates whether or not this Font object's style is
PLAIN.
return
true if this Font has a
PLAIN sytle;
false otherwise.
see
java.awt.Font#getStyle
since
JDK1.0
	return style == 0;
    
public booleanisTransformed()
Indicates whether or not this Font object has a
transform that affects its size in addition to the Size
attribute.
return
true if this Font object
has a non-identity AffineTransform attribute.
false otherwise.
see
java.awt.Font#getTransform
since
1.4
	return nonIdentityTx;
    
public java.awt.font.GlyphVectorlayoutGlyphVector(java.awt.font.FontRenderContext frc, char[] text, int start, int limit, int flags)
Returns a new GlyphVector object, performing full
layout of the text if possible. Full layout is required for
complex text, such as Arabic or Hindi. Support for different
scripts depends on the font and implementation.

Bidi, and should only be performed on text that
has a uniform direction. The direction is indicated in the
flags parameter,by using LAYOUT_RIGHT_TO_LEFT to indicate a
right-to-left (Arabic and Hebrew) run direction, or
LAYOUT_LEFT_TO_RIGHT to indicate a left-to-right (English)
run direction.


In addition, some operations, such as Arabic shaping, require
context, so that the characters at the start and limit can have
the proper shapes. Sometimes the data in the buffer outside
the provided range does not have valid data. The values
LAYOUT_NO_START_CONTEXT and LAYOUT_NO_LIMIT_CONTEXT can be
added to the flags parameter to indicate that the text before
start, or after limit, respectively, should not be examined
for context.


All other values for the flags parameter are reserved.
param
frc the specified FontRenderContext
param
text the text to layout
param
start the start of the text to use for the GlyphVector
param
limit the limit of the text to use for the GlyphVector
param
flags control flags as described above
return
a new GlyphVector representing the text between
start and limit, with glyphs chosen and positioned so as to best represent
the text
throws
ArrayIndexOutOfBoundsException if start or limit is
out of bounds
see
java.text.Bidi
see
#LAYOUT_LEFT_TO_RIGHT
see
#LAYOUT_RIGHT_TO_LEFT
see
#LAYOUT_NO_START_CONTEXT
see
#LAYOUT_NO_LIMIT_CONTEXT

      GlyphLayout gl = GlyphLayout.get(null); // !!! no custom layout engines
      StandardGlyphVector gv = gl.layout(this, frc, text,
					 start, limit, flags, null);
      GlyphLayout.done(gl);
      return gv;
    
private native voidpDispose()
private voidreadObject(java.io.ObjectInputStream s)
Reads the ObjectInputStream.
Unrecognized keys or values will be ignored.
param
s the ObjectInputStream to read
serial
see
#writeObject(java.io.ObjectOutputStream)
      s.defaultReadObject();
      if (pointSize == 0) {
		pointSize = (float)size;
 	  }
      width = 1f; // init transient field
      initializeFont(fRequestedAttributes);
    
public java.lang.StringtoString()
Converts this Font object to a String
representation.
return
a String representation of this
Font object.
since
JDK1.0
	String	strStyle;

	if (isBold()) {
	    strStyle = isItalic() ? "bolditalic" : "bold";
	} else {
	    strStyle = isItalic() ? "italic" : "plain";
	}

	return getClass().getName() + "[family=" + getFamily() + ",name=" + name + ",style=" +
	    strStyle + ",size=" + size + "]";
    
private voidwriteObject(java.io.ObjectOutputStream s)
Writes default serializable fields to a stream.
param
s the ObjectOutputStream to write
see
AWTEventMulticaster#save(ObjectOutputStream, String, EventListener)
see
#readObject(java.io.ObjectInputStream)

                            
       
       
	     
    
      s.defaultWriteObject();