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 l = 0, r = nums.length - 1, mid;
        while (l <= r) {
            mid = l + ((r - l) >> 1);
            if (nums[mid] == target) return mid;
            else if (nums[mid] < target) l = mid + 1;
            else r = mid - 1;
        }
        return -1;
    }
}