题解 | #二分查找-I#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param nums int整型一维数组 
     * @param target int整型 
     * @return int整型
     */
    public int search (int[] nums, int target) {
        // write code here
        int begin = 0;
        int end = nums.length-1;
	   //开始≤结束
        while(begin<=end){
		  //取中间件的下表
            int middle = (begin+end)/2;
            if(nums[middle]==target){
                return middle;
            }else if(nums[middle]>target){
                end = middle-1;
            }else{
                begin = middle+1;
            }
        }
        return -1;
    }
}