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++) {

            while (strs[i].indexOf(prefix) != 0) {
                prefix = prefix.substring(0, prefix.length() - 1);
            }

        }

        return prefix;

    }

}

Create : 14 Longest Common Prefix
Create : 14 Longest Common Prefix
