在数组中查找并返回下标

public static void main(String[] args) {        //Arrays 应用类 在数组中查找 并返回下标        int arr1[] = new int[]{56,12,15,46,84,75,56};        Arrays.sort(arr1);        System.out.println(Arrays.binarySearch(arr1,12));        System.out.println(Arrays.binarySearch(arr1,15));        System.out.println(Arrays.binarySearch(arr1,50));        System.out.println(Arrays.binarySearch(arr1,60));    }

4.6.6以数组形式输出数组

import java.util.Arrays;public class Example09 {    public static void main(String[] args) {        int score[] = new int[]{67,78,65,88,79};        System.out.println(Arrays.toString(score));    }}