ArrayMethodDemo.java

import java.util.Scanner;

import java.util.Arrays;

 

public class ArrayMethodDemo{

  public static void main(String[] args){

    Scanner scanner=new Scanner(System.in);

 

    int[] arr={93,5,3,55,57,7,2,73,41,91};

 

    System.out.print("排序前: ");

    for(int i=0;i<arr.length;i++)

      System.out.print(arr[i]+" ");

    System.out.println();

 

    Arrays.sort(arr);

 

    System.out.print("排序后: ");

    for(int i=0;i<arr.length;i++)

      System.out.print(arr[i]+" ");

 

    System.out.print("/n请输入搜索值:");

    int key=scanner,nextInt();

    int find=-1;

    if((find=Array.binarySearch(arr,key))>-1){

      System.out.println("找到值于索引"+find+"位置");

    }

    else

      System.out.println("找不到指定的值");

  }

}