展开全部

1//例子1

2import java.applet.*;import java.awt.*;

3import java.awt.event.*;

4public class Example18_1 extends Applet implements MouseListener

5{ TextField text;

6 public void init()

7 { text=new TextField(40); add(text);

8 addMouseListener(this) ;//向小程序增加鼠标事件监视器。

9 }

10 public void mousePressed(MouseEvent e)

11 { text.setText("鼠标键按下了,位置62616964757a686964616fe58685e5aeb931333236373761是"+e.getX()+","+e.getY() );

12 }

13 public void mouseReleased(MouseEvent e)

14 { text.setText(" 鼠标松开了,位置是"+e.getX()+","+e.getY() );

15 }

16 public void mouseEntered(MouseEvent e)

17 { text.setText(" 鼠标进来了,位置是"+e.getX()+","+e.getY() );

18 }

19 public void mouseExited(MouseEvent e)

20 { text.setText(" 鼠标走开了");

21 }

22 public void mouseClicked(MouseEvent e)

23 { if(e.getClickCount()==2)

24 { text.setText("鼠标键双击,位置:"+e.getX()+","+e.getY());

25 }

26 else {}

27 }

28}

29

30//例子2

31import java.awt.*;import java.awt.event.*;

32class MyCanvas extends Canvas implements MouseListener

33{ int left=-1,right=-1; //记录左、右键用的变量。

34 int x=-1,y=-1; //记录鼠标位置用的变量。

35 MyCanvas()

36 { setSize(100,100);

37 setBackground(Color.cyan) ;

38 addMouseListener(this);

39 }

40 public void paint(Graphics g)

41 { if(left==1)

42 { g.drawOval(x-10,y-10,20,20);

43 }

44 else if(right==1)

45 { g.drawRect(x-8,y-8,16,16);

46 }

47 }

48 public void mousePressed(MouseEvent e)

49 { x=e.getX(); y=e.getY();

50 if(e.getModifiers()==InputEvent.BUTTON1_MASK)

51 { left=1;right=-1;

52 repaint();

53 }

54 else if(e.getModifiers()==InputEvent.BUTTON3_MASK)

55 { right=1; left=-1;

56 repaint();

57 }

58 }

59 public void mouseReleased(MouseEvent e){}

60 public void mouseEntered(MouseEvent e){}

61 public void mouseExited(MouseEvent e)

62 { left=-1;right=-1;

63 repaint();

64 }

65 public void mouseClicked(MouseEvent e){}

66 public void update(Graphics g)

67 { if(left==1||right==1)

68 { paint(g);

69 }

70 else

71 { super.update(g);

72 }

73 }

74}

75public class Example18_2

76{ public static void main(String args[])

77 { Frame f=new Frame();

78 f.setBounds(100,100,200,200);f.setVisible(true);

79 f.addWindowListener(new WindowAdapter() //适配器

80 {public void windowClosing(WindowEvent e)

81 {System.exit(0);

82 }

83 });

84 f.add(new MyCanvas(),BorderLayout.CENTER);//添加画布。

85 f.validate();

86 }

87}

88

89//例子3

90import java.awt.*;import java.awt.event.*;

91import java.applet.*;

92public class Example18_3 extends Applet implements MouseListener

93{ TextField text; Button button;

94 TextArea textArea;

95 public void init()

96 { text=new TextField(10); text.addMouseListener(this);

97 button=new Button("按钮"); button.addMouseListener(this);

98 addMouseListener(this);

99 textArea=new TextArea(8,28);

100 add(button);add(text);add(textArea);

101 }

102 public void mousePressed(MouseEvent e)

103 { if(e.getSource()==button)

104 {textArea.append("\n在按钮上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");

105 }

106 else if(e.getSource()==text)

107 {textArea.append("\n在文本框上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");

108 }

109 else if(e.getSource()==this)

110 {textArea.append("\n在容器上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");

111 }

112 }

113 public void mouseReleased(MouseEvent e) {}

114 public void mouseEntered(MouseEvent e) {}

115 public void mouseExited(MouseEvent e) {}

116 public void mouseClicked(MouseEvent e)

117 { if(e.getClickCount()>=2)

118 textArea.setText("鼠标连击，位置:"+"("+e.getX()+","+e.getY()+")");

119 }

120}

已赞过

已踩过<

你对这个回答的评价是？

评论

收起