Arrays 类的一些常见用法
package cn.ljs; import java.util.Arrays; public class ArrayDemo { public static void main(String [] args){ int [] arr1 = {1,2,3}; int [] arr2 = {1,434,34,2,3}; System.out.println(Arrays.equals(arr1,arr2)); // 简单说比较两数组形状相同不 System.out.println(Arrays.toString(arr1)); // toString Arrays.sort(arr2); System.out.println(Arrays.toString(arr2)); Arrays.fill(arr1,-1); // 填充-1 System.out.println(Arrays.toString(arr1)); int index = Arrays.binarySearch(arr2,3); // 排序 System.out.println(index); int [] b = Arrays.copyOf(arr1, arr1.length); //copy 数组 System.out.println(arr1 == b); } }