Java Input Buffer Garbage
===

Why is good practice to empty the 'Garbage' from the input buffer in a block of code like this? What would happen if I didn't?

    try{
		
				age = scanner.nextInt();
				// If the exception is thrown, the following line will be skipped over.
				// The flow of execution goes directly to the catch statement (Hence, Exception is caught)
				finish = true;
				
			}catch(InputMismatchException e){
				
				System.out.println("Invalid input. age must be a number.");
				// The following line empties the "garbage" left in the input buffer
				scanner.next();
				
			}