package com.day9.Array;
import java.util.Arrays;
public class Demo1Arrays {
/**
* public static String toString(int[] a)，返回数组指定的字符串形式
* public static void sort(int[] a)，排序
* public static int binarySearch(int[] a,int key)二分查找
*/
public static void main(String[] args) {
int[] arr={1,2,3,4,5,6,7,10,9,8};
System.out.println(Arrays.toString(arr));//[1,2,3,4,5,6,7,10,9,8]
Arrays.sort(arr);
System.out.println(Arrays.toString(arr));//[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
int[] arr1={1,2,3,4,5,6,7,8};
System.out.println(Arrays.binarySearch(arr1,6));//5
System.out.println(Arrays.binarySearch(arr1,60));//-9(-的插入点-1即-8-1=-9)
}
}