14 Longest Common Prefix.java

class Solution {
    public String longestCommonPrefix(String[] strs) {
        if(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;
    }
}