Java捕獲窗口焦點事件

Java捕獲窗口焦點事件

1. package com.han;
3. import java.awt.event.WindowEvent;
4. import java.awt.event.WindowFocusListener;
6. import javax.swing.JFrame;
8. /**
9. * 捕獲窗口焦點事件
10. * @author HAN
11. *
12. */
13. public class WindowEvent_1 extends JFrame {
15. /**
16. *
17. */
18. private static final long serialVersionUID = 6385933774053272194L;
20. public WindowEvent_1() {
21. // TODO Auto-generated constructor stub
22. addWindowFocusListener(new WindowFocusListener() {
24. @Override
25. public void windowGainedFocus(WindowEvent e) {
26. // TODO Auto-generated method stub
27. System.out.println("窗口獲得了焦點！");
28. }
30. @Override
31. public void windowLostFocus(WindowEvent e) {
32. // TODO Auto-generated method stub
33. System.out.println("窗口失去了焦點！");
34. }
36. });
37. }
39. /**
40. * @param args
41. */
42. public static void main(String[] args) {
43. // TODO Auto-generated method stub
44. WindowEvent_1 frame = new WindowEvent_1();
45. frame.setTitle("捕獲窗口焦點事件");
46. frame.setVisible(true);
47. frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
48. frame.setBounds(0, 0, 300, 100);
49. }
51. }