gistfile1.java

public static void main(String[] args) {
	Scanner in = new Scanner(System.in);
	int input;
	
	try {
		input = in.nextInt();
	} catch (InputMismatchException e) {
		System.out.println("You've provided bad input!");
		System.exit(1);
	}
	
	System.out.println("Thanks for your valid input!");
	// ...
}