Reading input using Scanner causes an infinite loop in Java [duplicate]

Answer 1

Not quite the answer you were expecting, but: refactor this code. Remember the basics of java, where every functional bit has its own method. So use a method that reads the input, and returns the level selected (or -1 if nothing):

int readInput() {
  // your code here, returning either the level or -1 on bad input
}

And then call that for your read loop:

int selected;
do {
  selected = readInput();
} while(selected < 1);