Whats wrong with this while loop? [duplicate]

Answer 1

Unrelated answer, I really really recommend you to follow Sun's style guidelines.

boolean r = false ; 
int s = 0 ;
while (r == false) {
    s = getInt() ; 
    if (!(s>=0 && s<=2)) {
        System.out.println ("try again not a valid response") ; 
    } else {
      r = true ;
    } 
}

You could get rid of the r variable and the if/else condition if you evaluate the result in the loop it self.

int s = 0;

while( ( s = getInt() ) < 0 || s > 2 ) {
    System.out.println( "Try again, not a valid response");
}