e889. adding a filter to a file chooser dialog.txt

这里面包含了一百多个JAVA源文件

This example add a filter for .java files to the file chooser. 
    JFileChooser fileChooser = new JFileChooser(new File(filename));
    fileChooser.addChoosableFileFilter(new MyFilter());
    
    // Open file dialog.
    fileChooser.showOpenDialog(frame);
    openFile(fileChooser.getSelectedFile());
    
    class MyFilter extends javax.swing.filechooser.FileFilter {
        public boolean accept(File file) {
            String filename = file.getName();
            return filename.endsWith(".java");
        }
        public String getDescription() {
            return "*.java";
        }
    }