FileFilter Java Swing Example

 import java.io.*; 
 import java.awt.*; 
 import javax.swing.*; 
 import java.awt.event.*; 
 public class JavaExampleFilterFileChooserInSwing extends JFrame implements ActionListener 
 { 
     JFileChooser Flchsr = new JFileChooser(); 
     JButton BtnFilechsr = new JButton("Show File Chooser"); 
     JTextField Txt = new JTextField(20); 
     public JavaExampleFilterFileChooserInSwing() 
      { 
         super("Example of Filter File Chooser in Java Swing"); 
         Container Cntnr = getContentPane(); 
         Cntnr.setLayout(new FlowLayout()); 
         Cntnr.add(BtnFilechsr);        
         Cntnr.add(Txt);        
         BtnFilechsr.addActionListener(this); 
         Flchsr.addChoosableFileFilter(new FiltrOne()); 
         Flchsr.addChoosableFileFilter(new FiltrTwo()); 
      } 
            public void actionPerformed(ActionEvent e1) 
            { 
                 int Rsult = Flchsr.showOpenDialog(null); 
                 if(Rsult == JFileChooser.APPROVE_OPTION) 
                { 
                       Txt.setText("You Choose" +Flchsr.getSelectedFile().getPath()); 
                    } 
            } 
                      public static void main(String aa[]) 
                      { 
                          JFrame Frm = new JavaExampleFilterFileChooserInSwing(); 
                          Frm.setBounds(210,210,310,310); 
                          Frm.setVisible(true); 
                          Frm.setDefaultCloseOperation( 
                         WindowConstants.DISPOSE_ON_CLOSE); 
                         Frm.addWindowListener(new WindowAdapter() 
                        { 
                               public void windowClosing(WindowEvent e2) 
                               { 
                                  System.exit(0); 
                               } 
                           }); 
                      } 
  } 
                          class FiltrOne extends javax.swing.filechooser.FileFilter 
                          { 
                              public boolean accept(File Fileob1) 
                               { 
                                  String Extnsn = " "; 
                                  if(Fileob1.getPath().lastIndexOf('.') > 0) 
                                  Extnsn = Fileob1.getPath().substring(Fileob1.getPath().lastIndexOf('.')+ 1).toLowerCase(); 
                                  if(Extnsn != "") 
                                  return Extnsn.equals("gif"); 
                                  else 
                                  return Fileob1.isDirectory(); 
                               } 
                                  public String getDescription() 
                                   { 
                                      return "Gif Files (*.gif)"; 
                                   } 
                         } 
                                 class FiltrTwo extends javax.swing.filechooser.FileFilter 
                                    { 
                                         public boolean accept(File Fileob1) 
                                          { 
                                              String Extnsn = ""; 
                                              if(Fileob1.getPath().lastIndexOf('.') > 0) 
                                              Extnsn = Fileob1.getPath().substring(Fileob1.getPath().lastIndexOf('.')+ 1).toLowerCase(); 
                                              if(Extnsn != "") 
                                              return Extnsn.equals("java"); 
                                              else 
                                              return Fileob1.isDirectory(); 
                                          } 
                                              public String getDescription() 
                                                 { 
                                                       return "Java Files (*.java)"; 
                                                 } 
                                  }