Check if string has all the letters of the alphabet

Question

What would be the best logic to check all the letters in a given string.

If all the 26 letters are available in the provided string, I want to check that and perform

Answer 1

public static void main(String[] args) {

    String A ="asdfsdafasdf";
    String B ="abcdefghijklmnopqrstuvwxyz";
    String C ="ASDFGFHWER";
    String result = "NO";

    String letters[] = {A,B,C};
    int length = letters.length;

    for(int j=0; j< length; j++){
        String letter = letters[j].toLowerCase();
        int letterLength = letter.length();
        for(char i='a'; i<'z'+1; i++){
            if(letter.contains (""+i)){
                result ="YES";
            } else{
                result = "NO";
            }
        }
        System.out.println(result);
    }
}