java二分查找

import java.util.Scanner;
import java.util.Arrays;

public class Erfen
{
    public static void main(String[]args)
    {
        Scanner sca=new Scanner(System.in);
        int[] arr={15,22,13,44,5,623,734,18,92,10};
        Arrays.sort(arr);
        int s=0,m=0,e=arr.length-1;
        System.out.println("请输入一个数在本数组进行查找");
        System.out.println(Arrays.toString(arr));
        int k=sca.nextInt();
        while(true)
        {
            m=(s+e)/2;
            if(arr[m]==k)
            {
                System.out.println("在下标"+m+"处");
                break;
            }
            else if(arr[m]>k)
            {
                e=m-1;
            }
            }
            else if(arr[m]<k)
            {
                s=m+1;
            }
            if(s>e)
            {
                System.out.println("查找不到该数字");
                break;
            }
        }
    }
}

本文出自 “程序员的学习日” 博客，请务必保留此出处http://laiyicong.blog.51cto.com/10811813/1715847

java二分查找

原文：http://laiyicong.blog.51cto.com/10811813/1715847