JAVA写的数独，附带生成唯一解和各种难度的算法

自己用GUI写的一个数独小游戏。。可选择难度，生成一个只有唯一解的数独。。可显示答案，玩家也可以自己做题。代码+算法全在里面

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.LineBorder;
import java.util.Random;
/**
 *
 * @author 晓之篷
 */
@SuppressWarnings（“serial“）
public class Sudoku extends Jframe{
    object[] fivelevel={12345};
    object level=JOptionPane.showInputDialog（null “1.初级--2.低级--3.中级--4高级--5.骨灰级“ “请选择难度“ JOptionPane.QUESTION_MESSAGE nullfivelevel fivelevel[2]）;
    private IndexButton[][] button=new IndexButton[9][9];
    private JButton check=new JButton（“检查“）;  //检查正确是否
    private JButton displayanswer=new JButton（“显示答案“）;  //列出答案
    private JButton hideanswer=new JButton（“隐藏答案“）;  //隐藏答案
    private CSSudoku cssudoku=new CSSudoku（（int）（level））;   //创建和解答数独
    private int[][] shudu=cssudoku.MySudoku（）;   //把创建的数独赋值给shudu[][]
    public Sudoku（） {
        JPanel pbutton=new JPanel（）;
        pbutton.setLayout（new GridLayout（1155））;
        pbutton.add（check）;
        pbutton.add（displayanswer）;
        pbutton.add（hideanswer）;
        hideanswer.setEnabled（false）;
        add（new SudokuPanel（shudu）BorderLayout.CENTER）;
        add（pbuttonBorderLayout.SOUTH）;
         for（int i=0;i<9;i++）{       //给每个按钮增加监听事件
                for（int j=0;j<9;j++）{
                    button[i][j].addActionListener（new ActionListener（） {

                    @Override
                    public void actionPerformed（ActionEvent e） {
                        IndexButton b=（IndexButton） e.getSource（）;
                        UpdateButton（b.geti（）b.getj（））;
                    }
                }）;  
                }
         }
        check.addActionListener（new ActionListener（） {   //给check增加监听事件
            @Override
            public void actionPerformed（ActionEvent e） {
                if（CSSudoku.test（shudu）==1）{  //检查结果正确
                    JOptionPane.showMessageDialog（null “正确“ “检查结果“ JOptionPane.INFORMATION_MESSAGE）;
                }
                else{
                    JOptionPane.showMessageDialog（null “有错误“ “检查结果“ JOptionPane.INFORMATION_MESSAGE）;
                }
            }
        }）;
        displayanswer.addActionListener（new ActionListener（） {   //显示答案的监听事件
            @Override
            public void actionPerformed（ActionEvent e） {
                int[][] result=new int[9][9];
                for（int i=0;i<9;i++）{
                    for（int j=0;j<9;j++） {
                        result[i][j]=shudu[i][j];
                    }         
                }
                if（cssudoku.SolveSudoku（result））{   //得到答案
                     result=cssudoku.ResultSudoku（）;
                     for（int i=0;i<9;i++）{         
                        for（int j=0;j<9;j++）{
                            if（button[i][j].getBackground（）==Color.WHITE||button[i][j].getBackground（）==Color.RED）{     //将玩家已经输入值的按钮设置成不可操作
                               button[i][j].setEnabled（false）; 
                            }
                     

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件         75  2012-04-03 16:56  Sudoku\build\built-jar.properties

     文件          0  2012-04-03 16:56  Sudoku\build\classes\.netbeans_automatic_build

     文件          0  2012-04-03 16:56  Sudoku\build\classes\.netbeans_update_resources

     文件       7135  2012-04-03 16:56  Sudoku\build\classes\CSSudoku.class

     文件        677  2012-04-03 16:56  Sudoku\build\classes\IndexButton.class

     文件        870  2012-04-03 16:56  Sudoku\build\classes\Sudoku$1.class

     文件        961  2012-04-03 16:56  Sudoku\build\classes\Sudoku$2.class

     文件       1927  2012-04-03 16:56  Sudoku\build\classes\Sudoku$3.class

     文件       1380  2012-04-03 16:56  Sudoku\build\classes\Sudoku$4.class

     文件       1314  2012-04-03 16:56  Sudoku\build\classes\Sudoku$5.class

     文件       2000  2012-04-03 16:56  Sudoku\build\classes\Sudoku$SudokuPanel.class

     文件       3851  2012-04-03 16:56  Sudoku\build\classes\Sudoku.class

     文件         31  2012-04-03 16:56  Sudoku\build\classes\Sudoku.rs

     文件       3713  2012-04-03 16:23  Sudoku\build.xml

     文件       1322  2012-04-03 16:56  Sudoku\dist\README.TXT

     文件      20761  2012-04-03 16:56  Sudoku\dist\Sudoku.jar

     文件         85  2012-04-03 16:23  Sudoku\manifest.mf

     文件      56944  2012-04-03 16:30  Sudoku\nbproject\build-impl.xml

     文件        475  2012-04-03 16:30  Sudoku\nbproject\genfiles.properties

     文件        103  2012-04-03 16:27  Sudoku\nbproject\private\private.properties

     文件        211  2012-04-03 16:56  Sudoku\nbproject\private\private.xml

     文件       2318  2012-04-03 16:32  Sudoku\nbproject\project.properties

     文件        514  2012-04-03 16:30  Sudoku\nbproject\project.xml

     文件      20301  2012-04-03 16:52  Sudoku\src\Sudoku.java

     目录          0  2012-04-03 16:56  Sudoku\build\generated-sources\ap-source-output

     目录          0  2012-04-03 16:56  Sudoku\build\classes

     目录          0  2012-04-03 16:56  Sudoku\build\empty

     目录          0  2012-04-03 16:56  Sudoku\build\generated-sources

     目录          0  2012-04-03 16:19  Sudoku\nbproject\configs

     目录          0  2012-04-03 16:56  Sudoku\nbproject\private

............此处省略9个文件信息