Java IO.pdf - Nguyen Dang Binh

public class ExtensionFilter extends javax.swing.filechooser.FileFilter {
}
String extension;
String description;
public ExtensionFilter(String extension, String description) {
}
if (extension.indexOf('.') == -1) {
extension = "." + extension;
}
this.extension = extension;
this.description = description;
public boolean accept(File f) {
}
if (f.getName().endsWith(extension)) {
return true;
}
else if (f.isDirectory()) {
return true;
}
return false;
public String getDescription() {
return this.description + "(*" + extension + ")";
}
Java I/O
Here's a main() method that tests this class. ExtensionFilter is used in several of the
examples yet to come.
public static void main(String[] args) {
}
JFrame parent = new JFrame(); // never shown
JFileChooser fc = new JFileChooser();
fc.setDialogTitle("Please choose a file: ");
fc.addChoosableFileFilter(new ExtensionFilter("txt", "Text Files"));
fc.addChoosableFileFilter(new ExtensionFilter("java",
"Java Source Code"));
fc.addChoosableFileFilter(new ExtensionFilter(".c", "C Source Code"));
fc.addChoosableFileFilter(new ExtensionFilter(".pl",
"Perl Source Code"));
fc.addChoosableFileFilter(new ExtensionFilter(".html", "HTML Files"));
fc.showOpenDialog(parent);
parent.dispose();
// Work around annoying AWT non-daemon thread bug.
System.exit(0);
The Swing source code contains hints that a class like this may be added to a future release of
Swing.
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