题解 | #最长公共前缀#

import java.util.*;

public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * @param strs string字符串一维数组 
     * @return string字符串
     */
    public String longestCommonPrefix (String[] strs) {
        // write code here
        if(strs.length == 0)
            return "";
        String res = strs[0];
        int len = res.length();
        int resultLength = res.length();
        for(int i = 1; i < strs.length; i++){
            String temp = strs[i];
            int j = 0;
            int tempLength = temp.length();
            for(; j < tempLength && j < len; j++){
                if(res.charAt(j) != temp.charAt(j)){
                    break;
                }
            }
            resultLength = j;    
        }

        return res.substring(0, resultLength);
    }
}