mousedemo1.java

这是清华大学编写的JAVA教材中所有题目的源代码！

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

class MouseDemo  
{
	Frame f=new Frame("鼠标示例");
	TextField tf1=new TextField(20);
	TextField tf2=new TextField(20);
	TextField tf3=new TextField(20);
	TextField tf4=new TextField(20);
	
	public MouseDemo() 
	{
		f.addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
		
		tf1.addMouseListener(new MouseAdapter()
		{
			public void mouseEntered(MouseEvent e)
			{
				tf2.setText("鼠标进入了文本域");
			}
			public void mouseExited(MouseEvent e)
			{
				tf2.setText("鼠标离开了文本域");
			}	
			public void mouseClicked(MouseEvent e)
			{
				int num=e.getClickCount();
				tf3.setText("你按了鼠标"+num+"次");
			}
			public void mousePressed(MouseEvent e)
			{
				if(e.getButton()==e.BUTTON1)
					tf4.setText("你按下了鼠标左键");
				else if(e.getButton()==e.BUTTON3)
					tf4.setText("你按下了鼠标右键");
			}	
			public void mouseReleased(MouseEvent e)
			{
				tf4.setText("你松开了鼠标");
			}
		});
		
		tf1.addMouseMotionListener(new MouseMotionAdapter()
		{
			public void mouseDragged (MouseEvent e)
    		{
				tf4.setText("你拖动了鼠标");
			}
			public void mouseMoved(MouseEvent e)
			{
				tf4.setText("鼠标移动到了新位置 X=" + e.getX()+ "  Y="+e.getY());
			}
		});

		f.setLayout(new GridLayout(4,1));
		f.add(tf1);
		f.add(tf2);
		f.add(tf3);
		f.add(tf4);
		f.setSize(300,200);
		f.setVisible(true);		
	}
	
	public static void main(String args[])
	{
		new MouseDemo();
	}
}