mainpanel.java

平时自己上课时候做的JAV实验代码

/*
 * MainPanel.java
 *
 * Created on 2006年12月24日, 下午7:44
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package javaapplication7;

import java.awt.Graphics;
import java.awt.Panel;
import java.util.Enumeration;
import java.util.Vector;
public class MainPanel extends Panel
{
    public Vector balls;
    synchronized public void paint(Graphics g)
    {
        paintBalls();
    }
    public void paintBalls()
    {
        Enumeration ballCollection=balls.elements();
        while(ballCollection.hasMoreElements())
        {
            Ball ball=(Ball)ballCollection.nextElement();
            ball.draw();
         }
     }
}