滚动的小球.txt

内有四个比较好玩的小游戏

//Checkers.java 
import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

//Checkers类 
public class Checkers extends JFrame implements ActionListener { 
//变量定义 
CheckersPanel checkers = new CheckersPanel(); 
JButton startButton = new JButton("start"); 
JButton stopButton = new JButton("stop"); 
//构造函数 
public Checkers(){ 
super("Checkers"); 
setSize(210,170); 
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
JPanel pane = new JPanel(); 
BorderLayout border = new BorderLayout(); 
pane.setLayout(border); 
pane.add(checkers,"Center"); 

JPanel buttonPanel = new JPanel(); 
startButton.addActionListener(this); 
buttonPanel.add(startButton); 
stopButton.addActionListener(this); 
stopButton.setEnabled(false); 
buttonPanel.add(stopButton); 

pane.add(buttonPanel,"South"); 
setContentPane(pane); 
show(); 
} 
//响应用户动作 
public void actionPerformed(ActionEvent evt){ 
if(evt.getSource() == startButton){ 
checkers.playAnimation(); 
startButton.setEnabled(false); 
stopButton.setEnabled(true); 
}else{ 
checkers.stopAnimation(); 
startButton.setEnabled(true); 
stopButton.setEnabled(false); 
} 
} 
//主函数 
public static void main(String[] arguments){ 
Checkers ck = new Checkers(); 
} 
} 

//CheckersPanel类 
class CheckersPanel extends JPanel implements Runnable{ 
//变量定义 
private Thread runner; 
int xPos = 5; 
int xMove = 4; 
//播放动画 
void playAnimation(){ 
if (runner ==null);{ 
runner = new Thread(this); 
runner.start(); 
} 
} 
//停止动画 
void stopAnimation(){ 
if (runner !=null);{ 
runner = null; 
} 
} 
//运行 
public void run(){ 
Thread thisThread = Thread.currentThread(); 
while(runner ==thisThread){ 
xPos += xMove; 
if ((xPos > 105)|(xPos < 5)) 
xMove *= -1; 
repaint(); 
try{ 
Thread.sleep(100); 
}catch(InterruptedException e){} 
} 
} 
//画图形 
public void paintComponent(Graphics comp){ 
Graphics2D comp2D = (Graphics2D)comp; 
comp2D.setColor(Color.blue); 
comp2D.fillRect(0,0,100,100); 
comp2D.setColor(Color.white); 
comp2D.fillRect(100,0,100,100); 
comp2D.setColor(Color.black); 
comp2D.fillOval(xPos,5,90,90); 
} 
}