| Methods Summary |
|---|
| public byte | byteValue()Returns the value of this Integer as a byte.
return (byte)value;
|
| public double | doubleValue()Returns the value of this Integer as a double.
return (double)value;
|
| public boolean | equals(java.lang.Object obj)Compares this object to the specified object.
The result is true if and only if the argument is not
null and is an Integer object that contains
the same int value as this object.
if (obj instanceof Integer) {
return value == ((Integer)obj).intValue();
}
return false;
|
| public float | floatValue()Returns the value of this Integer as a float.
return (float)value;
|
| public int | hashCode()Returns a hashcode for this Integer.
return value;
|
| public int | intValue()Returns the value of this Integer as an int.
return value;
|
| public long | longValue()Returns the value of this Integer as a long.
return (long)value;
|
| public static int | parseInt(java.lang.String s, int radix)Parses the string argument as a signed integer in the radix
specified by the second argument. The characters in the string
must all be digits of the specified radix (as determined by
whether {@link java.lang.Character#digit(char, int)} returns a
nonnegative value), except that the first character may be an
ASCII minus sign '-' ('\u002d') to
indicate a negative value. The resulting integer value is returned.
An exception of type NumberFormatException is thrown if any
of the following situations occurs:
- The first argument is null or is a string of length zero.
- The radix is either smaller than
{@link java.lang.Character#MIN_RADIX} or
larger than {@link java.lang.Character#MAX_RADIX}.
- Any character of the string is not a digit of the specified radix,
except that the first character may be a minus sign '-'
('\u002d') provided that the string is longer than length 1.
- The integer value represented by the string is not a value of type
int.
Examples:
parseInt("0", 10) returns 0
parseInt("473", 10) returns 473
parseInt("-0", 10) returns 0
parseInt("-FF", 16) returns -255
parseInt("1100110", 2) returns 102
parseInt("2147483647", 10) returns 2147483647
parseInt("-2147483648", 10) returns -2147483648
parseInt("2147483648", 10) throws a NumberFormatException
parseInt("99", 8) throws a NumberFormatException
parseInt("Kona", 10) throws a NumberFormatException
parseInt("Kona", 27) returns 411787
if (s == null) {
throw new NumberFormatException("null");
}
if (radix < Character.MIN_RADIX) {
throw new NumberFormatException("radix " + radix +
" less than Character.MIN_RADIX");
}
if (radix > Character.MAX_RADIX) {
throw new NumberFormatException("radix " + radix +
" greater than Character.MAX_RADIX");
}
int result = 0;
boolean negative = false;
int i = 0, max = s.length();
int limit;
int multmin;
int digit;
if (max > 0) {
if (s.charAt(0) == '-") {
negative = true;
limit = Integer.MIN_VALUE;
i++;
} else {
limit = -Integer.MAX_VALUE;
}
multmin = limit / radix;
if (i < max) {
digit = Character.digit(s.charAt(i++),radix);
if (digit < 0) {
throw new NumberFormatException(s);
} else {
result = -digit;
}
}
while (i < max) {
// Accumulating negatively avoids surprises near MAX_VALUE
digit = Character.digit(s.charAt(i++),radix);
if (digit < 0) {
throw new NumberFormatException(s);
}
if (result < multmin) {
throw new NumberFormatException(s);
}
result *= radix;
if (result < limit + digit) {
throw new NumberFormatException(s);
}
result -= digit;
}
} else {
throw new NumberFormatException(s);
}
if (negative) {
if (i > 1) {
return result;
} else { /* Only got "-" */
throw new NumberFormatException(s);
}
} else {
return -result;
}
|
| public static int | parseInt(java.lang.String s)Parses the string argument as a signed decimal integer. The
characters in the string must all be decimal digits, except that
the first character may be an ASCII minus sign '-'
('\u002d') to indicate a negative value. The resulting
integer value is returned, exactly as if the argument and the radix
10 were given as arguments to the
{@link #parseInt(java.lang.String, int)} method.
return parseInt(s,10);
|
| public short | shortValue()Returns the value of this Integer as a short.
return (short)value;
|
| public static java.lang.String | toBinaryString(int i)Creates a string representation of the integer argument as an
unsigned integer in base 2.
The unsigned integer value is the argument plus 232if
the argument is negative; otherwise it is equal to the argument.
This value is converted to a string of ASCII digits in binary
(base 2) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude
will not be the zero character. The characters '0'
('\u0030') and '1' ('\u0031') are used
as binary digits.
return toUnsignedString(i, 1);
|
| public static java.lang.String | toHexString(int i)Creates a string representation of the integer argument as an
unsigned integer in base 16.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in hexadecimal
(base 16) with no extra leading 0s. If the
unsigned magnitude is zero, it is represented by a single zero
character '0' ('\u0030'); otherwise, the first
character of the representation of the unsigned magnitude will
not be the zero character. The following characters are used as
hexadecimal digits:
0123456789abcdef
These are the characters '\u0030' through '\u0039'
and 'u\0039' through '\u0066'.
return toUnsignedString(i, 4);
|
| public static java.lang.String | toOctalString(int i)Creates a string representation of the integer argument as an
unsigned integer in base 8.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in octal
(base 8) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude will
not be the zero character. The octal digits are:
01234567
These are the characters '\u0030' through '\u0037'.
return toUnsignedString(i, 3);
|
| public static java.lang.String | toString(int i, int radix)Creates a string representation of the first argument in the
radix specified by the second argument.
If the radix is smaller than Character.MIN_RADIX or
larger than Character.MAX_RADIX, then the radix
10 is used instead.
If the first argument is negative, the first element of the
result is the ASCII minus character '-'
('\u002d'). If the first
argument is not negative, no sign character appears in the result.
The remaining characters of the result represent the magnitude of
the first argument. If the magnitude is zero, it is represented by
a single zero character '0' ('\u0030'); otherwise,
the first character of the representation of the magnitude will
not be the zero character.
The following ASCII characters are used as digits:
0123456789abcdefghijklmnopqrstuvwxyz
These are '\u0030' through '\u0039' and
'\u0061' through '\u007a'. If the
radix is N, then the first N of these
characters are used as radix-N digits in the order shown.
Thus, the digits for hexadecimal (radix 16) are
0123456789abcdef.
if (radix < Character.MIN_RADIX || radix > Character.MAX_RADIX)
radix = 10;
char buf[] = new char[33];
boolean negative = (i < 0);
int charPos = 32;
if (!negative) {
i = -i;
}
while (i <= -radix) {
buf[charPos--] = digits[-(i % radix)];
i = i / radix;
}
buf[charPos] = digits[-i];
if (negative) {
buf[--charPos] = '-";
}
return new String(buf, charPos, (33 - charPos));
|
| public java.lang.String | toString()Returns a String object representing this Integer's value. The
value is converted to signed decimal representation and returned
as a string, exactly as if the integer value were given as an
argument to the {@link java.lang.Integer#toString(int)} method.
return String.valueOf(value);
|
| public static java.lang.String | toString(int i)Returns a new String object representing the specified integer. The
argument is converted to signed decimal representation and returned
as a string, exactly as if the argument and radix 10 were
given as arguments to the {@link #toString(int, int)} method.
return toString(i, 10);
|
| private static java.lang.String | toUnsignedString(int i, int shift)Convert the integer to an unsigned number.
char[] buf = new char[32];
int charPos = 32;
int radix = 1 << shift;
int mask = radix - 1;
do {
buf[--charPos] = digits[i & mask];
i >>>= shift;
} while (i != 0);
return new String(buf, charPos, (32 - charPos));
|
| public static java.lang.Integer | valueOf(java.lang.String s)Returns a new Integer object initialized to the value of the
specified String. The argument is interpreted as representing a
signed decimal integer, exactly as if the argument were given to
the {@link #parseInt(java.lang.String)} method. The result is an
Integer object that represents the integer value specified
by the string.
In other words, this method returns an Integer object equal
to the value of:
new Integer(Integer.parseInt(s))
return new Integer(parseInt(s, 10));
|
| public static java.lang.Integer | valueOf(java.lang.String s, int radix)Returns a new Integer object initialized to the value of the
specified String. The first argument is interpreted as representing
a signed integer in the radix specified by the second argument,
exactly as if the arguments were given to the
{@link #parseInt(java.lang.String, int)} method. The result is an
Integer object that represents the integer value
specified by the string.
In other words, this method returns an Integer object
equal to the value of:
new Integer(Integer.parseInt(s, radix))
return new Integer(parseInt(s,radix));
|
