IMPLEMENTING AN ACTIONLISTENER USING AN ANONYMOUS LOCAL CLASS

 1 package at.krux.javase.gui.event;

 2 import java.awt.GridLayout;
 3 import java.awt.event.ActionEvent;
 4 import java.awt.event.ActionListener;
 5 import javax.swing.JButton;
 6 import javax.swing.JFrame;
 7 import javax.swing.JLabel;

 8 public class ActionListenerAnonymousClass {
	
 9   JFrame frame;
10   JButton button;
11   JLabel label;
12   GridLayout grid = new GridLayout(2, 1);
	
13   ActionListenerAnonymousClass() {
14     this.frame = new JFrame();
15     this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
16     this.button = new JButton("OK");
17     this.label = new JLabel("waiting for an ActionEvent to occur...", JLabel.CENTER);
18     this.frame.setLayout(grid);
		
19     this.button.addActionListener(new ActionListener() {
20       public void actionPerformed(ActionEvent e) {
21         label.setText("an ActionEvent has occurred!");
22       }			
23     });

24     this.frame.add(label);
25     this.frame.add(button);
26     this.frame.setBounds(200, 200, 450, 250);
		
27     this.frame.setVisible(true);
28   }

29   public static void main(String[] args) {
30     new ActionListenerAnonymousClass();
31   }
32 }