Java 小例子：编写石头剪刀布游戏

Code:

import javax.swing.*;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.HeadlessException;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.List;

import java.util.Random;



/**

* 石头剪刀布游戏，游戏介绍参见：

* <p/>

* http://en.wikipedia.org/wiki/Rock-paper-scissors

*

* @author yiding.he

*/

public class RockPaperScissors extends JFrame {



protected final JLabel messageLabel = new JLabel(INITIAL_MESSAGE);



private final GameProcessor gameProcessor = new GameProcessor();



private List<JButton> buttons = new ArrayList<JButton>();



protected JPanel buttonsPanel;



public static final String INITIAL_MESSAGE = "我准备好了，出招吧 XD";



public RockPaperScissors() throws HeadlessException {

initFrame();

initControls();



restartGame();

}



/**

* 设置窗体

*/

private void initFrame() {

this.setSize(300, 120);

this.setLocation(300, 300);

this.setTitle("野球拳");

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

}



/**

* 设置控件

*/

private void initControls() {

BorderLayout bl = new BorderLayout();

bl.setVgap(5);

getContentPane().setLayout(bl);



messageLabel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

messageLabel.setHorizontalAlignment(SwingConstants.CENTER);

getContentPane().add(messageLabel, BorderLayout.NORTH);



buttonsPanel = new JPanel(new GridLayout(1, GameItem.values().length, 5, 0));

getContentPane().add(buttonsPanel);



createButtons();

}



/**

* 创建按钮

*/

private void createButtons() {

for (GameItem item : GameItem.values()) {

ItemButton button = new ItemButton(item);

buttons.add(button);

buttonsPanel.add(button);

}

}



/**

* 启用或禁用全部按钮

*

* @param enabled 启用或禁用

*/

private void setButtonsEnabled(boolean enabled) {

for (JButton button : buttons) {

button.setEnabled(enabled);

}

}



/**

* 处理并显示游戏结果

*

* @param gameItem 玩家选择

*/

private void processAndShowGameResult(GameItem gameItem) {

String result = gameProcessor.process(gameItem);

messageLabel.setText(result);

}



/**

* 重置游戏界面

*/

private void restartGame() {

messageLabel.setText(INITIAL_MESSAGE);

gameProcessor.reset();

}



/////////////////////////////////////////////////////////



/**

* 游戏逻辑处理

*/

private static class GameProcessor {



private GameItem item;



private Random r = new Random();



/**

* 重置游戏，机器生成自己的选项

*/

public void reset() {

int index = r.nextInt(GameItem.values().length);

this.item = GameItem.values()[index];

}



/**

* 处理玩家输入的选项，得出本局结果

*

* @param gameItem 玩家选项

*

* @return 本局结果

*/

public String process(GameItem gameItem) {

int result = item.compareWith(gameItem);

if (result > 0) {

return "哈哈，你输了，我出的是" + item.getLabel();

} else if (result < 0) {

return "啊，我出了个" + item.getLabel() + "，不小心让你赢了一次……";

} else {

return "嘿，我出的也是" + item.getLabel() + "，打个平手！";

}

}

}



/////////////////////////////////////////////////////////



/**

* 用户选择按钮，每个 ItemButton 对应一个 GameItem

*/

private class ItemButton extends JButton {



private GameItem item;



public GameItem getGameItem() {

return item;

}



private ItemButton(String text) {

super(text);

}



private ItemButton(GameItem item) {

this(item.getLabel());

this.item = item;



this.addActionListener(new ActionListener() {

public void actionPerformed(final ActionEvent e) {

new Thread() {



@Override

public void run() {

ItemButton button = (ItemButton) e.getSource();



processAndShowGameResult(button.getGameItem());

sleepForAWhile();

restartGame();

}

}.start();

}



private void sleepForAWhile() {

setButtonsEnabled(false);

try {

Thread.sleep(2000);

} catch (InterruptedException e1) {

e1.printStackTrace();

}

setButtonsEnabled(true);

}

});

}

}



/////////////////////////////////////////////////////////



private static enum GameItem {



Rock("石头"), Scissor("剪刀"), Paper("布");



private String label;



public String getLabel() {

return label;

}



private GameItem(String label) {

this.label = label;

}



public int compareWith(GameItem item) {

if (this == item) {

return 0;

} else if ((this == Rock && item == Scissor) ||

(this == Scissor && item == Paper) ||

(this == Paper && item == Rock)) {

return 1;

} else {

return -1;

}

}

}



//////////////////////////////////////////////////////////



public static void main(String[] args) throws Exception {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

new RockPaperScissors().setVisible(true);

}

}

谨作参考。