for loop to while loop

Question

I am using a for loop to print the backwards alphabet in uppercase but I would like to know how to do the same thing with a while loop, which I am

Answer 1

x = alphabet.length() - 1;
while( x > -1 )
    {
        System.out.print(  alphabet.charAt( x ));  
        System.out.print( alphabet.toUpperCase() );
        x--;
    }