Java簡易井字棋

輸入三行三列數字，例如：
0 0 0
1 0 0
0 0 1
其中，0代表O，1代表X。

代碼運行邏輯： 檢查行 --> 檢查列 --> 檢查對角線 --> 檢查反對角線
輸出 棋局結果【1(X) is winner .】、【0(O) is winner .】、【平局 !】。

import java.util.Scanner;

public class TicTacToe {

	public static void main(String[] args) {
		try {
			Scanner in = new Scanner(System.in);
			int [][] board = new int[3][3];
			
			for(int i = 0; i < board.length; i++) {//讀入
				for(int j = 0; j < board[i].length; j++) {
					board[i][j] = in.nextInt();
				}
			}

			int flag = -1;  //-1: 平局;   1: (X)勝利;   0: (O)勝
			
			int num1 = 0;  //1的數量  1代表X
			int num0 = 0;  //0的數量  0代表O
			
			for(int i = 0; i < board.length; i++) {  //檢查行
				if(flag == -1) {  //平局 --> 繼續驗證
					for(int j = 0; j < board[i].length; j++) {
						if(board[i][j] == 1) {
							num1++;
						} else {
							num0++;
						}
					}
					if(num1 == 3 || num0 == 3) {
						if(num1 == 3) {
							flag = 1;
							System.out.println("1(X) is winner .");
				            break;
						} else {
							flag = 0;
							System.out.println("0(O) is winner .");
				            break;
						}
			        } else {
			        	flag = -1;
			        	break;
			        }
				}
			}
			
			if(flag == -1) {  //檢查列:  平局 --> 繼續驗證
				num1 = 0;
				num0 = 0;
				for(int i = 0; i < 3; i++) {
					if(flag == -1) {
						for(int j = 0; j < 3; j++) {
							if(board[j][i] == 1) {
								num1++;
							} else {
								num0++;
							}
						}
						if(num1 == 3 || num0 == 3) {
							if(num1 == 3) {
								flag = 1;
								System.out.println("1(X) is winner .");
					            break;
							} else {
								flag = 0;
								System.out.println("0(O) is winner .");
					            break;
							}
				        } else {
				        	flag = -1;
				        	break;
				        }
					}
				}
			}
			
			if(flag == -1) {  //檢查對角線:  平局 --> 繼續驗證
				num1 = 0;
				num0 = 0;
				for(int i = 0; i < 3; i++) {
					if(board[i][i] == 1) {
						num1++;
					} else {
						num0++;
					}
				}
				if(num1 == 3 || num0 == 3) {
					if(num1 == 3) {
						flag = 1;
						System.out.println("1(X) is winner .");
					} else {
						flag = 0;
						System.out.println("0(O) is winner .");
					}
		        } else {
		        	flag = -1;
		        }
			}
			
			if(flag == -1) {  //檢查反對角線:  平局 --> 繼續驗證
				num1 = 0;
				num0 = 0;
				for(int i = 0; i < 3; i++) {
					if(board[i][2-i] == 1) {
						num1++;
					} else {
						num0++;
					}
				}
				if(num1 == 3 || num0 == 3) {
					if(num1 == 3) {
						flag = 1;
						System.out.println("1(X) is winner .");
					} else {
						flag = 0;
						System.out.println("0(O) is winner .");
					}
		        } else {
		        	flag = -1;
		        }
			}
			
			if(flag == -1) {
				System.out.println("平局 !");
			}
			
		} catch(Exception e){
			System.out.println("程序異常 !");
		}
		
    }
}
/**

檢查行：
1 1 1
0 1 0
0 0 1
1(X) is winner .

0 0 0
1 0 0
0 0 1
0(O) is winner .


平局：
0 1 0
0 1 1
1 0 1


檢查對角線：
1 0 0
0 1 0
0 0 1
1(X)勝利：

try {
	
} catch(Exception e){
	
}
*/