To create an Exception in Java, you could do something like this:
class GameException extends Exception {
 GameException() {
  super();
 }
 GameException(String msg) {
  super(msg);
 }
 GameException(String msg, Throwable cause) {
  super(msg, cause);
 }
 GameException(Throwable cause) {
  super(cause);
 }
}
To use this Exception, you  can do the following:
if(!checkNumbers(num1, num2)) throw new GameException();
Where checkNumbers() is your method on seeing if your two input numbers are acceptable with your requirements.
4
solved Java, Exception kinda [closed]