二维数组阶梯式的方法

package com.sxt;


import java.util.Arrays;


public class KeBen {
public static void main(String[] args) {
int a[][] = new int[3][3];//定义一个3*3的数组


System.out.println(Arrays.toString(a[0]));
System.out.println(Arrays.toString(a[1]));
System.out.println(Arrays.toString(a[2]));
int b[][] = new int[3][];//定义普通二为数组只能是三行
for (int i = 0; i < b.length; i++) {
b[i] = new int[i + 1];//定义每一行的长度
for (int j = 0; j < i; j++) {
b[i][j] = j;//给每一阿航赋值
}
}
System.out.println(Arrays.toString(b[0]));
System.out.println(Arrays.toString(b[1]));
System.out.println(Arrays.toString(b[2]));
}

}