二维数组遍历的方式(for普通循环遍历、foreach循环遍历、toString方式遍历)

package com.Summer_0421.cn;

import java.lang.reflect.Array;
import java.util.Arrays;

/**
 * @author Summer
 * 二维数组遍历的方式for普通循环和foreach循环、toString遍历
 */
public class Test03 {

    public static void main(String[] args) {
        show1();
        show2();
        show3();
    }

    private static void show3() {
        int[][] its = new int[][]{{1},{1,2},{1,2,3},{1,2,3,4}};
        for (int i = 0; i < its.length; i++) {
            System.out.println(Arrays.toString(its[i]));
        }

    }

    private static void show2() {
        int[][] its = new int[][]{{1},{1,2},{1,2,3},{1,2,3,4}};
        for (int[] is : its) {
            for (int i : is) {
                System.out.print(i+" ");
            }
            System.out.println();
        }
    }

    private static void show1() {
        int[][] its = new int[][]{{1},{1,2},{1,2,3},{1,2,3,4}};
        for (int i = 0; i < its.length; i++) {
            for (int j = 0; j < its[i].length; j++) {
                System.out.print(its[i][j]+" ");
            }
            System.out.println();
        }
    }

}