0014_Longest Common Prefix.java

class Solution {
    public String longestCommonPrefix(String[] strs) 
    {
        if(strs.length==0) return "";
        String result = strs[0];
        for(int i=1;i<strs.length;i++)
            while(strs[i].indexOf(result) != 0)
            result = result.substring(0,result.length()-1);
        return result;
    }
}