Arrays

package cn.hello;

import java.util.Arrays;

/*
 * Arrays类
 *         public static String toString(int[] a) :把数组转为字符串
 *         public static void sort(int[] a)  对数组进行排序
 *         public static int binarySearch(int[] a,int key)   二分查找
 * */

public class Test01 {
    public static void main(String[] args) {
        int[] arr={23,44,12,55,67};
        System.out.println(Arrays.toString(arr));
        
        Arrays.sort(arr);
        
        System.out.println(Arrays.toString(arr));
        
        System.out.println(Arrays.binarySearch(arr,24));
    
    }
}