mousetest.java

点击画圆的程序,大家分享一下.java程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MouseTest extends MouseAdapter{
	Frame myFrame=new Frame("鼠标画圆");
	JPanel myPanel=new JPanel();
	Canvas ca=new Canvas();
	Color c;

	int x,y;
	public void init(){
		myFrame.addWindowListener(
			new WindowAdapter(){
				public void windowClosing(WindowEvent e){
					System.exit(0);
				}
			}
		);
		myPanel.add(ca);
		myFrame.add(myPanel);
		ca.addMouseListener(this);
		ca.setSize(600,600);
		myFrame.setSize(600,600);
		myFrame.setVisible(true);
	}
	public static void main(String []args){
		MouseTest mt=new MouseTest();
		mt.init();
	}
	public void mouseClicked(MouseEvent e){
		int r=(int)(Math.random()*256);
		int g=(int)(Math.random()*256);
		int b=(int)(Math.random()*256);
		x=e.getX();
		y=e.getY();
		c=new Color(r,g,b);
		myPanel.setForeground(c);
		ca.getGraphics().fillOval(x,y,50,50);
	}


}