J2ME 小游戏 炸弹超人

package boomman;


import java.util.*;

public class Board {
         public char[][] chBoard;
         /*
                 N - None
                 W - Wall
                 L - Pillar
                 P - Player
                 E - Enemy
                 B - Bomb
                 U - Bomb under player
                 X - Exploding
         */
         private Random random;
         public int iCols, iRows;
         public volatile boolean isGameOver;
         public volatile boolean isWin;

         public Board( int cols, int rows ) {
                 random = new Random();

                 iCols = cols;
                 iRows = rows;
                 chBoard = new char[iCols][iRows];

                 init();