Java中Arrays的使用

package com.atguigu.java;import java.util.Arrays;/** java.util.Arrays:操作数组的工具类，里面定义了很多操作数组的方法* * */
public class ArraysTest {public static void main(String[] args) {// 1.boolean equals(int[] a,int[] b):判断两个数组是否相等。int[] arr1 = new int[] { 1, 2, 3, 4 };int[] arr2 = new int[] { 1, 3, 2, 4 };boolean isEquals = Arrays.equals(arr1, arr2);System.out.println(isEquals);// 2.String toString(int[] a):输出数组信息。System.out.println(Arrays.toString(arr1));// 3.void fill(int[] a,int val):将指定值填充到数组之中。Arrays.fill(arr1, 10);System.out.println(Arrays.toString(arr1));// 4.void sort(int[] a):对数组进行排序。Arrays.sort(arr2);System.out.println(Arrays.toString(arr2));// 5.int binarySearch(int[] a,int key)int[] arr3 = new int[] { -98, -34, 2, 34, 54, 66, 79, 105, 210, 333 };int index = Arrays.binarySearch(arr3, 210);if (index >= 0) {System.out.println(index);} else {System.out.println("未找到");}}
}