【leetcode刷题笔记】Longest Common Prefix

 1 public class Solution {
 2     public String longestCommonPrefix(String[] strs) {
 3         if(strs == null || strs.length == 0)
 4             return "";
 5         
 6         StringBuffer answer = new StringBuffer();
 7         for(int i = 0;i < strs[0].length();i++){
 8             char now = strs[0].charAt(i);
 9             for(int j = 1;j < strs.length;j++){
10                 if(i>strs[j].length()-1 || strs[j].charAt(i) != now)
11                     return answer.toString();
12             }
13             answer.append(now);
14         }
15         return answer.toString();
16     }
17 }