初学多线程，求教（九格子游戏）

[东门吹雪]

/*九格子游戏。请编写多线程游戏，设计一个3*3的格子（每个格子对应一个按钮）。
 * 每个格子上对应一个线程，格子上文字只能是A、X或H，而且刚好只有一个格子上是H。
 * 其中，H表示人在该格子上，A表示当前的格子是安全的，X表示不安全。每个格子如果不是文字H，
 * 则每过一段时间就切换其上的文字A与X。只能单击H所在的格子的上下左右按钮。如果单击的格子当时的文字是A，
 * 则单击的格子的文字变成H，而H原来所在格子的文字变为A（然后进行A与X的文字切换）。如果单击的格子当时是
 * 文字X，则gameover，如果文字H在每个格子上都出现过，则Pass。*/

/*題目要求是每个按钮对应一个线程，我只用了一个线程，就当着和main方法是多线程吧。
 * 现在的问题是程序刚开始运行正常，过一段时间（可能需要3~4分钟）会抛出数组越界和空指针的异常，
 * 我想可能是对按钮的处理出现的问题，由于我刚学一个月，周围也没人交流，所以望各位大虾大牛不吝赐教啊，
 * 占用您宝贵的时间感到万分抱歉，THX*/

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.LinkedList;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;

class J_NineGrid extends JFrame
{
	static JButton [][] b = {{new JButton("1"), new JButton("2"), new JButton("3")}, 
							 {new JButton("4"), new JButton("5"), new JButton("6")},
							 {new JButton("7"), new JButton("8"), new JButton("9")}};
	
	int [][] flag= new int[3][3];  
	Container c = getContentPane();
	
	public J_NineGrid()
	{
		super("NineGridGame");
		
		c.setLayout(new FlowLayout());
				
		int [] list  = {1, 0, 1, 0, 1, 0, 1, 0, 2};
		int [] rList = getList(list);         // 	随机序列，用于初始化面板
		String bText;
		
		for (int i=0; i<3; i++)
			for (int j=0; j<3; j++)
			{			
				if (rList[i*3+j] == 1)
					bText = "A";
				else if (rList[i*3+j] == 0)
					bText = "X";
				else
					bText = "H";
			
			b[i][j].addActionListener(new ActionListener()  // 响应按钮事件
			{
				int cx , cy; // 当前按下按钮的坐标
				int bx , by; // H按钮的坐标
				boolean tag;
				
				public void actionPerformed(ActionEvent e) 
				{					
					JButton cButton = (JButton)e.getSource();
					cx = Integer.parseInt(cButton.getName())/3;
					cy = Integer.parseInt(cButton.getName())%3;
					
					for (int i=0; i<3; i++)
						for (int j=0; j<3; j++)
						{
							if (b[i][j].getText() == "H")
							{
								bx = i;
								by = j;
								flag[i][j] = 1;
								break;
							}		
					}
					
					if (cButton.getText() != "H")
					{
						if (Math.abs(bx-cx)+Math.abs(by-cy) == 1)  // 判断是否是H按钮的上下左右按钮
						{
							if (cButton.getText() == "X")
									System.out.println("Fail");
							else if (cButton.getText() == "A")
							{
								cButton.setText("H");
								b[bx][by].setText("A");
								flag[cx][cy] = 1;
							}
						}
					}
					
					tag = true;
					for (int i=0; i<3; i++)
						for (int j=0; j<3; j++)
						{
							if (flag[i][j] == 0)
								tag = false;		
						}
					if (tag)
						System.out.println("Pass(@_@)");
				}			
			});
			
			b[i][j].setText(bText);       // set button text
			b[i][j].setName(""+(i*3+j));  // set button name
			c.add(b[i][j]);
		}	
	}
	
	public void ChangeName()
	{		
		String bText = "";
		for (int i=0; i<3; i++)
			for (int j=0; j<3; j++)
			{			
				if(b[i][j].getText() == "A")
				{
					bText = "X";
				}
				else if(b[i][j].getText() == "X")
				{
					bText = "A";
				}
				else if(b[i][j].getText() == "H")
				{
					bText = "H";
				}
			
			b[i][j].setText(bText);         // set button text
			c.add(b[i][j]);
		}
	}
			
	public  int[] getList(int[] list)       // 产生随机序列	
	{
		int count = list.length;
		int [] resultList = new int[count];
		LinkedList<Integer> temp = new LinkedList<Integer>();
		for (int i=0; i<count; i++)
		{
			temp.add((Integer)list[i]);
		}
				
		Random rand = new Random();
		for (int i=0; i<count; i++)
		{
			int num = rand.nextInt(count - i);
			resultList[i] = (Integer)temp.get(num);
			temp.remove(num);
		}
				
		return resultList;
	}	
}

class T_ChangeName extends Thread
{
	J_NineGrid game2;
	
	public T_ChangeName(J_NineGrid game)
	{
		game2 = game;
	}
	
	public void run()
	{
		System.out.println("Begin");
		for ( ; true; )
		{
			game2.ChangeName();
			try 
			{
				Thread.sleep(2000);
			} 
			catch (InterruptedException e) 
			{
				e.printStackTrace();
			}				
		}
	}
}

public class J_NineGridGame 
{
	public static void main(String args[])
	{
		J_NineGrid game = new J_NineGrid();
		game.setLocationRelativeTo(null);
		game.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		game.setSize(150, 150);
		game.setVisible(true);
		
		T_ChangeName thread = new T_ChangeName(game);
		thread.start();
	}
}

---------------------------------------------------
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: No such child: 8
at java.awt.Container.getComponent(Container.java:294)
at javax.swing.JComponent.rectangleIsObscured(JComponent.java:4339)
at javax.swing.JComponent.paint(JComponent.java:1027)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278)
at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
at javax.swing.JComponent._paintImmediately(JComponent.java:5072)
at javax.swing.JComponent.paintImmediately(JComponent.java:4882)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:785)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[东门吹雪]

[Quote=引用 1 楼 softroad 的回复:]
java.lang.ArrayIndexOutOfBoundsException: No such child: 8

数组越界了，自己调试吧。
[/Quote]

这个是程序运行了差不多3分钟才跳出来的，其中是一个无限循环，每隔2s执行一次，3分钟，我要按多少下呢，我已经试了，没调出来啊。

[打油的程序员]

楼主好像重复发帖，那我也不客气了多刷点分

错误的地方有好几处，比如：

// ---------------------------------------------------------------------------------------------
    public int[] getList(int[] list) // 产生随机序列
    {
    int count = list.length;
    int[] resultList = new int[count];
    LinkedList<Integer> temp = new LinkedList<Integer>();

    for (int i = 0; i < count; i++) {
        temp.add((Integer) list[i]);
    }

    // Random rand = new Random();
    // for (int i = 0; i < count; i++) {
    // int num = rand.nextInt(count - i);

    // resultList[i] = (Integer)
    // temp.get(num);//此时的temp长度可能变化，可能不变化，count-i是始终在变的,
    // temp.remove(num); //remove后 此时的temp长度可能变化，可能不变化
    // }

    Collections.shuffle(temp);// 打乱它
    for (int i = 0; i < count; i++) {
        list[i] = temp.get(i);// 复制到resultList;
    }
    return resultList;
    }
    // ------------------------------------------------------------------------------------------

//我看上面的程序晕晕的，然后就没耐心了，干脆进行大幅度修改，修改后的程序如下：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class TestNineGridGame {
    public static void main(String[] args) {
    new GameFrame();
    }
}

class GameFrame extends JFrame {
    private JPanel gamePane = null;;

    public GameFrame() {
    super("NineGridGame");
    // System.out.println("hi");
    launch();
    }

    public void launch() {
    setTitle("controlPane");
    // setLayout(new FlowLayout());
    gamePane = new GamePanel(this);
    add(gamePane);
    setPreferredSize(new Dimension(150, 140));
    pack();
    setVisible(true);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    }
}

// ///////////////////////////////////////////////////////////////////////////////////////
class GamePanel extends JPanel implements ActionListener {
    JFrame drawFrame;

    enum Flag {
    A, X, H
    };

    Flag flag;

    private static final int BUTTON_ROW_SIZE = 3;
    private static final int BUTTON_COL_SIZE = 3;
    private static final int TIME_INTERVAL = 3000;// 3秒钟间隔
    private JButton[][] buttons = null;;// 面板上有9个JButton
    private String[][] texts = null;// 存放按钮对应的文本;
    private Set<JButton> passButtons = null; // 产生一个H在数组中的任意位置，然后其他位置随机填充"A","X";
    public GamePanel() {
    Launch();
    }

    public GamePanel(JFrame drawFrame) {// 重载构造方法，接收传来的Frame
    this.drawFrame = drawFrame;    ;
    Launch();
    }

    void Launch() {
    setLayout(new FlowLayout());
    passButtons = new HashSet<JButton>();// 存放显示过“H”的按钮，
    texts = generateAXH();// 产生一个H在数组中的任意位置，然后其他位置随机填充"A","X";
    buttons = new JButton[GamePanel.BUTTON_ROW_SIZE][GamePanel.BUTTON_COL_SIZE];
    for (int i = 0; i < BUTTON_ROW_SIZE; i++) {// 面板上有9个JButton
        for (int j = 0; j < BUTTON_COL_SIZE; j++) {
        buttons[i][j] = new JButton(texts[i][j]);// 以随机产生的text初始化按钮
        add(buttons[i][j]);// 按钮添加到面板上
        buttons[i][j].addActionListener(this);// 每个按钮添加监听器，相当于每个按钮都有一个线程在监听鼠标
        }
    }
    new Thread(new PaintThread()).start();    
    }

    public String[][] generateAXH() {// 产生一个H在数组中的任意位置，然后其他位置随机填充"A","X";
    String texts[][] = new String[BUTTON_ROW_SIZE][BUTTON_COL_SIZE];
    int randomRow = (int) (Math.random() * BUTTON_ROW_SIZE);
    int randomCol = (int) (Math.random() * BUTTON_COL_SIZE);
    texts[randomRow][randomCol] = "H";
    for (int i = 0; i < BUTTON_ROW_SIZE; i++) {
        for (int j = 0; j < BUTTON_COL_SIZE; j++)
        if (texts[i][j] == null) {
            texts[i][j] = Math.random() < 0.5 ? "A" : "X";
        }
    }
    return texts;
    }

    public void paintComponent(Graphics g) {// 重写paintComponent方法，
    super.paintComponent(g);
    for (int i = 0; i < GamePanel.BUTTON_ROW_SIZE; i++)
        for (int j = 0; j < GamePanel.BUTTON_COL_SIZE; j++) {
        if (buttons[i][j].getText().equals("A"))
            buttons[i][j].setText("X");
        else if (buttons[i][j].getText().equals("X")) {
            buttons[i][j].setText("A");
        }
        }
    }

    public void actionPerformed(ActionEvent e) {// 实现每个按钮监听器的方法
    JButton jb = (JButton) e.getSource();
    if (jb.getText().equals("X")) {
        prompt("gameOver");
        System.exit(0);
    }

    int beforeRowOfH = 0;// 记录之前H的位置
    int beforeColOfH = 0;// 记录之前H的位置
    int nowRowOfH = 0;// 记录现在H的位置
    int nowColOfH = 0;// 记录现在H的位置

    for (int i = 0; i < BUTTON_ROW_SIZE; i++)
        for (int j = 0; j < GamePanel.BUTTON_COL_SIZE; j++) {
        if (buttons[i][j].getText().equals("H")) {
            beforeRowOfH = i;
            beforeColOfH = j;
        }
        if (buttons[i][j] == jb) {
            nowRowOfH = i;
            nowColOfH = j;
        }
        }

    //行数相等列数差1 或者列数相等行数差1
    if ((nowRowOfH == beforeRowOfH && (nowColOfH == beforeColOfH + 1 | nowColOfH == beforeColOfH - 1))|
        (nowColOfH == beforeColOfH && (nowRowOfH == beforeRowOfH + 1 | nowRowOfH == beforeRowOfH - 1))) {
        if (jb.getText().equals("A")) {
        jb.setText("H");
        passButtons.add(buttons[nowRowOfH][nowColOfH]);// 将显示过“H”的按钮放入set
        if (passButtons.size() >= BUTTON_ROW_SIZE * BUTTON_COL_SIZE)
            prompt("pass");// 判断是否通过了
        buttons[beforeRowOfH][beforeColOfH].setText("A");
        }
    } else {// 非法点击按钮
        prompt("只能单击H所在的格子的上下左右按钮");
    }
    }
    
    

    public void prompt(String promptMessage) {
    JOptionPane.showConfirmDialog(null, promptMessage, "友情提示",
        JOptionPane.WARNING_MESSAGE);
    }

    private class PaintThread implements Runnable {// JPanel重画的线程
    public void run() {
        while (true) {
        repaint();
        // updateUI();
        try {
            Thread.sleep(GamePanel.TIME_INTERVAL);// /过一段时间，就重画面板
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        }
    }
    }
}

[完美灬缺陷]

帮顶下。

[softroad]

java.lang.ArrayIndexOutOfBoundsException: No such child: 8

数组越界了，自己调试吧。

[阳明 to life]

哪一行出错的

[东门吹雪]

谢谢四楼的热心回复啊，但我重复发帖了，另一贴里多给你点分作为感谢啊，这篇就作无满意结贴处理咯，技术我们还是务实点好哦，ths！