try/catch with InputMismatchException creates infinite loop

Question

So I\'m building a program which takes ints from user input. I have what seems to be a very straightforward try/catch block which, if the user doesn\'t enter an int, should

Answer 1

To complement the AmitD answer:

Just copy/pasted your program and had this output:

Error!
Enter first num: 
.... infinite times ....

As you can see, the instruction:

n1 = input.nextInt();

Is continuously throwing the Exception when your double number is entered, and that's because your stream is not cleared. To fix it, follow the AmitD answer.