java 解决棋盘覆盖有关问题

java 解决棋盘覆盖问题
/**
*
*/
package com.chessboard;

/**
* @author Administrator
*
*/

public class ChessBoard {
/**
* @param args
*/
final static int board_size = 4;
static int tial = 1;
static int [][]board = new int [board_size][board_size];
static void chessBoard(int tr,int tc,int dr,int dc,int size) {
if(size == 1)
return;
int s = size/2 ;
//System.out.println(s);
int t = tial++;

if(dr<tr+s && dc<tc+s) {//特殊方格在左上角棋盘中
chessBoard(tr,tc,dr,dc,s);
} else {//特殊方格不在此，则设置右下角方格为特殊方格
board[tr+s-1][tc+s-1] = t;
chessBoard(tr,tc,tr+s-1,tc+s-1,s);
}

if(dr<tr+s && dc>=tc+s) {//特殊方格在右上角棋盘中
chessBoard(tr,tc+s,dr,dc,s);
} else {//特殊方格不在此，则设置左下角方格为特殊方格
board[tr+s-1][tc+s] = t;
chessBoard(tr,tc+s,tr+s-1,tc+s,s);
}

if(dr>=tr+s && dc<tc+s) {//特殊方格在左下角棋盘中
chessBoard(tr+s,tc,dr,dc,s);
} else {//特殊方格不在此，则设置右上角方格为特殊方格
board[tr+s][tc+s-1] = t;
chessBoard(tr+s,tc,tr+s,tc+s-1,s);
}

if(dr>=tr+s && dc>=tc+s) {//特殊方格在右下角棋盘中
chessBoard(tr+s,tc+s,dr,dc,s);
} else {//特殊方格不在此，则设置左上角方格为特殊方格
board[tr+s][tc+s] = t;
chessBoard(tr+s,tc+s,tr+s,tc+s,s);
}
}

public static void main(String[] args) {
// TODO Auto-generated method stub
board[2][2] = 0;//特殊方格的位置
chessBoard(0,0,2,2,board_size);

for(int i=0;i<board_size;i++) {
for(int j=0;j<board_size;j++) {
System.out.print(board[i][j]+" ");
}
System.out.println();
}
}

}