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