Arrays类

 1 package com.lin.array;
 2 
 3 import java.util.Arrays;
 4 
 5 public class ArrayDemo6 {
 6     public static void main(String[] args) {
 7         int[] a={1,2,3,4,9090,31231,543,21,3,23};
 8         //System.out.println(a);//[I@4554617c
 9 
10         //打印数组元素Arrays.toString
11         //System.out.println(Arrays.toString(a));
12 
13         Arrays.sort(a);//数组进行排序：升序
14         System.out.println(Arrays.toString(a));
15 
16         //Arrays.fill(a,0);//数组填充
17         Arrays.fill(a,2,4,0);//数组填充
18         System.out.println(Arrays.toString(a));
19     }
20 }