题解 | 最长公共前缀

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 strs string字符串一维数组
     * @return string字符串
     */
    public String longestCommonPrefix (String[] strs) {
        if(strs.length == 0){
            return "";
        }
        int length = strs.length;
        String first = strs[0];
        boolean result;
        for (int i = first.length() - 1; i >= 0 ; i--) {
            result = true;
            String second = first.substring(0, i + 1);
            for (int j = 0; j < length; j++) {
                if (!strs[j].contains(second)) {
                    result = false;
                }
            }
            if (result) {
                return second;
            }
        }
        return "";
    }
}