Question

java 如何实现控制鼠标点击

鼠标已经移动到按钮上了 需要点击左键 是不是不能实现啊 百度没有找到啊 到底java能不能

Answer 1

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}