[Java] 聊聊Arrays.deepToString()和Arrays.toString()的区别

package com.oovever.hutool.util;
import java.util.Arrays;
/**
* @Author OovEver
* @Date 2017/12/24 17:31
*/
public class test {
 public static void main(String[] args) {
  int a[] = {1, 2, 3};
  System.out.println(Arrays.toString(a));
  int b[][] = {{1, 2, 3}, {4, 5, 6}};
  System.out.println(Arrays.toString(b));
  System.out.println(Arrays.deepToString(b));
 }
}

[1, 2, 3]
[[I@14ae5a5, [I@7f31245a]
[[1, 2, 3], [4, 5, 6]]

public static String deepToString(Object[] a)

java.util.Arrays.deepToString()

import java.util.Arrays;
/**
 * Arrays.deepToString()方法打印的是二维数组中一维数组中的值
 * Arrays.toString()方法打印的是二维数组中一维数组的地址
 */
public class TestDeepToString {
 public static void main(String[] args) {
  int[] array1 = {6, 6, 6};
  int[] array2 = {8, 8, 8};
  int[][] array3 = {array1, array2};
//  int[][] array4 = {{6, 6, 6}, {8, 8, 8}};
  System.out.println(Arrays.deepToString(array3)); //[[6, 6, 6], [8, 8, 8]]
  System.out.println(Arrays.toString(array3));  //[[I@511d50c0, [I@60e53b93]
 }
}

[[6, 6, 6], [8, 8, 8]]
[[I@511d50c0, [I@60e53b93]