Leetcode no. 14

14. Longest Common Prefix

Write a function to find the longest common prefix string amongst an array of strings.

public class Solution {    public String longestCommonPrefix(String[] strs) {        if (strs.length==0) return "";            String s= strs[0];            for (int i = 1; i < strs.length; i++) {                while (strs[i].indexOf(s)!=0)                    s=s.substring(0,s.length()-1);            }            return s;    }}