exit（0）不会终止我的Java代码中的程序执行。 为什么？

Question

public class TicTacToe{
    public static void main(String[] args){
        System.out.println("X starts the game");
        Scanner sc = new Scanner(System.in);
        char a[][] = new char[3][3];
        int n=0;
        int i = 0;
        int j = 0;
        while(n<9){
                System.out.println("Enter the coordinates but not" +i +" " +j);
                int x = sc.nextInt();
                int y = sc.nextInt();
                System.out.println("Enter X");
                a[x][y]=sc.next().charAt(0);
                n++;
                if(n>3){
                    if(a[0][0]=='X' && a[0][1]== 'X' && a[0][2]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[0][0]=='X' && a[1][0]== 'X' && a[2][0]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[1][0]=='X' && a[1][1]== 'X' && a[1][2]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[0][1]=='X' && a[1][1]== 'X' && a[2][1]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[2][0]=='X' && a[2][1]== 'X' && a[2][2]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[0][2]=='X' && a[1][2]== 'X' && a[2][2]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[0][0]=='X' && a[1][1]== 'X' && a[2][2]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                    else if(a[0][2]=='X' && a[1][1]== 'X' && a[2][0]=='X'){
                        System.out.println("Congrats! X won");
                        exit(0);
                    }
                }
                System.out.println("Enter the coordinates but not" +x +" " +y);
                i = sc.nextInt();
                j = sc.nextInt();
                System.out.println("Enter O");
                a[i][j]=sc.next().charAt(0);
                n++;
                if(n>3){
                    if(a[0][0]=='O' && a[0][1]== 'O' && a[0][2]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[0][0]=='O' && a[1][0]== 'O' && a[2][0]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[1][0]=='O' && a[1][1]== 'O' && a[1][2]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[0][1]=='O' && a[1][1]== 'O' && a[2][1]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[2][0]=='O' && a[2][1]== 'O' && a[2][2]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[0][2]=='O' && a[1][2]== 'O' && a[2][2]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[0][0]=='O' && a[1][1]== 'O' && a[2][2]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                    else if(a[0][2]=='O' && a[1][1]== 'O' && a[2][0]=='O'){
                        System.out.println("Congrats! O won");
                        exit(0);
                    }
                }
        }
        sc.close();
    }

    private static void exit(int i) {
        // TODO Auto-generated method stub

    }
}

我已经编写了实现Tic Tac Toe（带有婴儿步骤）的代码。 X或O赢得游戏后，exit（0）实际上并不终止程序执行。 该程序仍在询问下一个输入。 那时候如何终止代码？

Answer 1

您的exit（0）正在调用一个空方法。 替换为：

private static void exit(int i) {
    System.exit(i);
}