File	Doc	Category	Size	Date	Package
ExampleFileFilter.java	API Doc	Sun JDK 1.4.2 Example	8550	Thu May 12 00:35:27 BST 2005	None

ExampleFileFilter

• java.lang.Object
  • javax.swing.filechooser.FileFilter

Fields Summary
private static String	TYPE_UNKNOWN
private static String	HIDDEN_FILE
private Hashtable	filters
private String	description
private String	fullDescription
private boolean	useExtensionsInDescription

Constructors Summary
public ExampleFileFilter() Creates a file filter. If no filters are added, then all files are accepted. see #addExtension this.filters = new Hashtable();
public ExampleFileFilter(String extension) Creates a file filter that accepts files with the given extension. Example: new ExampleFileFilter("jpg"); see #addExtension this(extension,null);
public ExampleFileFilter(String extension, String description) Creates a file filter that accepts the given file type. Example: new ExampleFileFilter("jpg", "JPEG Image Images"); Note that the "." before the extension is not needed. If provided, it will be ignored. see #addExtension this(); if(extension!=null) addExtension(extension); if(description!=null) setDescription(description);
public ExampleFileFilter(String[] filters) Creates a file filter from the given string array. Example: new ExampleFileFilter(String {"gif", "jpg"}); Note that the "." before the extension is not needed adn will be ignored. see #addExtension this(filters, null);
public ExampleFileFilter(String[] filters, String description) Creates a file filter from the given string array and description. Example: new ExampleFileFilter(String {"gif", "jpg"}, "Gif and JPG Images"); Note that the "." before the extension is not needed and will be ignored. see #addExtension this(); for (int i = 0; i < filters.length; i++) { // add filters one by one addExtension(filters[i]); } if(description!=null) setDescription(description);

Methods Summary
public boolean	accept(java.io.File f) Return true if this file should be shown in the directory pane, false if it shouldn't. Files that begin with "." are ignored. see #getExtension see FileFilter#accepts if(f != null) { if(f.isDirectory()) { return true; } String extension = getExtension(f); if(extension != null && filters.get(getExtension(f)) != null) { return true; }; } return false;
public void	addExtension(java.lang.String extension) Adds a filetype "dot" extension to filter against. For example: the following code will create a filter that filters out all files except those that end in ".jpg" and ".tif": ExampleFileFilter filter = new ExampleFileFilter(); filter.addExtension("jpg"); filter.addExtension("tif"); Note that the "." before the extension is not needed and will be ignored. if(filters == null) { filters = new Hashtable(5); } filters.put(extension.toLowerCase(), this); fullDescription = null;
public java.lang.String	getDescription() Returns the human readable description of this filter. For example: "JPEG and GIF Image Files (*.jpg, *.gif)" see setDescription see setExtensionListInDescription see isExtensionListInDescription see FileFilter#getDescription if(fullDescription == null) { if(description == null || isExtensionListInDescription()) { fullDescription = description==null ? "(" : description + " ("; // build the description from the extension list Enumeration extensions = filters.keys(); if(extensions != null) { fullDescription += "." + (String) extensions.nextElement(); while (extensions.hasMoreElements()) { fullDescription += ", ." + (String) extensions.nextElement(); } } fullDescription += ")"; } else { fullDescription = description; } } return fullDescription;
public java.lang.String	getExtension(java.io.File f) Return the extension portion of the file's name . see #getExtension see FileFilter#accept if(f != null) { String filename = f.getName(); int i = filename.lastIndexOf('."); if(i>0 && i<filename.length()-1) { return filename.substring(i+1).toLowerCase(); }; } return null;
public boolean	isExtensionListInDescription() Returns whether the extension list (.jpg, .gif, etc) should show up in the human readable description. Only relevent if a description was provided in the constructor or using setDescription(); see getDescription see setDescription see setExtensionListInDescription return useExtensionsInDescription;
public void	setDescription(java.lang.String description) Sets the human readable description of this filter. For example: filter.setDescription("Gif and JPG Images"); see setDescription see setExtensionListInDescription see isExtensionListInDescription this.description = description; fullDescription = null;
public void	setExtensionListInDescription(boolean b) Determines whether the extension list (.jpg, .gif, etc) should show up in the human readable description. Only relevent if a description was provided in the constructor or using setDescription(); see getDescription see setDescription see isExtensionListInDescription useExtensionsInDescription = b; fullDescription = null;