Longest Common Prefix

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

题目解析：写一个函数找出字符串数组的最长公共前缀，比如输入，String[] strs = { "aac", "aacab", "aac", "aabba", "aa" }输出 aa

解法：比较简单，属于leetcode easy级别的使用到substring（start，end），要注意该函数是左闭右开即只能取到【start，end-1】，上AC代码

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;
	}

Longest Common Prefix

原文：http://blog.csdn.net/xsf50717/article/details/47374785