LeetCode - Longest Common Prefix

题目：

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

思路：

以第一个字符串为基准，然后循环比较

package string;public class LongestCommonPrefix {public String longestCommonPrefix(String[] strs) {int len = 0;if (strs == null || (len = strs.length) == 0) return "";StringBuilder sb = new StringBuilder();int i = 0;int len0 = strs[0].length();while (i < len0) {char c = strs[0].charAt(i);for (int j = 1; j < len; ++j) {if (i >= strs[j].length() || strs[j].charAt(i) != c)return sb.toString();}sb.append(c);++i;}return sb.toString();}public static void main(String[] args) {// TODO Auto-generated method stubString[] strs = { "abc", "ab", "abcd", "abcdef" };LongestCommonPrefix l = new LongestCommonPrefix();System.out.println(l.longestCommonPrefix(strs));}}

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