【LeetCode OJ 14】Longest Common Prefix
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题目链接：https://leetcode.com/problems/longest-common-prefix/
题目：Write a function to find the longest common prefix string amongst an array of strings.
解题思路：寻找字符串数组的最长公共前缀，将数组的第一个元素作为默认公共前缀，依次与后面的元素进行比较，取其公共部分，比较结束后，剩下的就是该字符串数组的最长公共前缀，示例代码如下：
public class Solution {public String longestCommonPrefix(String[] strs){if (strs == null || strs.length == 0){return "";}String prefix = strs[0];for (int i = 1; i < strs.length; i++){int j = 0;while (j < strs[i].length() && j < prefix.length() && strs[i].charAt(j) == prefix.charAt(j)){j++;}if (j == 0){return "";}prefix = prefix.substring(0, j);}return prefix;}} 0 0
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