JAVA Swing窗口在桌面上浮动

2012-02-15

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1 class Util {

2 private Toolkit tool;

3 private int width;

4 private int height;

5 private int screenWidth;

6 private int screenHeight;

7 private int leftMargin;

8 private int topMargin;

9 private static JFrame win;

10 enum X {LEFT, RIGHT};

11 enum Y {UP, DOWN};

12 public Util(JFrame win, int width, int height) {

13 Util.win = win;

14 this.width = width;

15 this.height = height;

16 tool = win.getToolkit();

17 this.screenWidth = tool.getScreenSize().width;

18 this.screenHeight = tool.getScreenSize().height;

19 Util.win.setVisible(true);

20 Util.win.addKeyListener(new KeyAdapter() {

21 @Override

22 public void keyPressed(KeyEvent e) {

23 // 按ESC键退出程序

24 if (e.getKeyCode() == 27) {

25 System.exit(0);

26 }

27 }

28 });

29 }

30 /**

31 * @param speed

32 * 移动速度

33 *

34 **/

35 public void fly(int speed) {

36 // 每次移动距离

37 int offset = 2;

38 // 左边距

39 int x = this.leftMargin;

40 // 除去窗口的屏幕宽度

41 int width = this.screenWidth - this.width;

42 //上边距

43 int y = this.topMargin;

44 // 除去窗口的屏幕高度

45 int height = this.screenHeight - this.height;

46 // 运动方向

47 X directX = X.LEFT;

48 Y directY = Y.UP;

49 while (true) {

50 if (x < 0)

51 directX = X.RIGHT;

52 else if (x >= width)

53 directX = X.LEFT;

54 if (y < 0)

55 directY = Y.DOWN;

56 else if (y >= height)

57 directY = Y.UP;

58 if (directX == X.RIGHT)

59 x += offset;

60 else

61 x -= offset;

62 if (directY == Y.DOWN)

63 y += offset;

64 else

65 y -= offset;

66 win.setBounds(x, y, this.width, this.height);

67 try {

68 Thread.sleep(speed);

69 } catch (InterruptedException e) {}

70 }

71 }

72 }

测试用例：public static void main(String[] args) {

//创建实例

new Util(new JFrame(), 300, 200).fly(10);

}

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