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 left, right;
        left = 0;
        right = nums.length - 1;
        int mid = (right-left) / 2;
        while(left <= right){
            mid = (right + left) / 2;
            if(nums[mid] == target) return mid;
            else if(nums[mid] > target){
                right = mid - 1;
            }
            else {
                left = mid + 1;
            }
        }
        return -1;
    }
}

二分