14 最长公共前缀

14 最长公共前缀

class Solution {
    public String longestCommonPrefix(String[] strs) {
        String ans = "";
        if (strs == null || strs.length == 0)
            return ans;
        for (int i = 0; i < strs[0].length(); i++) {
            for (int j = 1; j < strs.length; j++)
                if (i == strs[j].length() || strs[j].charAt(i) != strs[0].charAt(i))
                    return strs[0].substring(0, i);
        }
        return strs[0];
    }
}