ballframe.java

自己写的弹球程序～～比较适合初学者去看～～

package day03.ball;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

/**
 * 显示整个界面的frame
 * 
 * @author Administrator
 *
 */
public class BallFrame extends JFrame{
	private BallPanel panel;//显示小球的panel
	public static final int WIDTH = 450;
	public static final int HEIGHT = 350;

	//所有可供选择的小球颜色
	private Color[] colors = {Color.blue, Color.magenta, Color.orange, Color.red, Color.yellow, Color.pink,Color.green};

	
	private JButton start,close;//开始按钮和关闭按钮
	
	
	public BallFrame(){
		  panel = new BallPanel();//创建显示小球的面板
	      start=new JButton("Start");
	      close=new JButton("Close");
	      
	      this.add(panel, BorderLayout.CENTER);
	      
	      JPanel buttonPanel = new JPanel();
	      buttonPanel.add(start);
	      buttonPanel.add(close);
	      this.add(buttonPanel, BorderLayout.SOUTH);
	}
	
	/**
	 * 给按钮添加事件监听
	 *
	 */
	public void addEventHandler(){
		start.addActionListener(new ActionListener(){  
            public void actionPerformed(ActionEvent evt){
                addBall();
             }
          });
		
		close.addActionListener(new ActionListener() {
	    	  public void actionPerformed(ActionEvent evt) { 
	    		  System.exit(0); 
	    	  }
	    });
	      
	}
	
	public void showMe(){
		addEventHandler();
	    setSize(WIDTH, HEIGHT);
	    setTitle("Ball Game");
	    setVisible(true);
	    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	/**
	 * 该方法控制向面板中添加一个小球
	 *
	 */
	public void addBall()   {
		Ball b = new Ball(panel, colors[(int)(Math.random()* colors.length)]);  //生成一个小球，随机选择一种颜色
		//将小球加到面板中
		panel.addBall(b);
		//新建一个线程来控制小球
		BallThread thread = new BallThread(b); 
		thread.start();
		thread.refreshSpeed();
	}
	
	
	public static void main(String[] args) {
		new BallFrame().showMe();
	}
}