for循环中的Java增量声明

Question

public class F2E12 {

    public static final int DIM = 5;

    public static void main(String[] args) {
        printMatrix(DIM);

    }

    public static void printMatrix(int n) {
        int i = 0;
        int j = 0;
        for(;i<=n;i++) {
            for(;j<=n;j++) {
                System.out.print(j + " ");
            }
            System.out.print("\n");

        }
    }
}

我想打印一个矩阵,将每行的第一个数字递增1.上面的代码应该产生:

1. 0 1 2 3 4 5
2. 1 0 1 2 3 4
3. 2 1 0 1 2 3
4. 3 2 1 0 3 4
5. 4 3 2 1 0 1
6. 5 4 3 2 1 0

相反它打印."0 1 2 3 4 5"

Answer 1

public static void printMatrix(int n) {
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j <= n; j++) {
            System.out.print(Math.abs(j - i) + " ");
        }
        System.out.print("\n");
    }
}