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

Not a optimal solution but it works.

String a= new String("the quick brown fox jumps over the lazy dog");
        int n=a.length();
        int[] b= new int[123];
        char x;
        boolean flag=true;
        for(int i=0;i