mypanel.java

这是一个swing的练习

package testpackage;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

public class MyPanel extends JPanel{
	private Graphics g1;
	
	public MyPanel()
	{
		addMouseListener(new MouseAdapter(){
			public void mouseClicked(MouseEvent e)
			{
				repaint(100,100,200,300);
			}
		}
		);
	}
	
	public void paintComponent(Graphics g)
	{
		g.drawLine(100, 100, 100, 200);
	
	}
	

	
}