Collatz conjecture calculator

Collatz.java

public class Collatz {
	public static void main(String[] args) {
		String input;
		System.out.println("Press ctrl+c to quit\n");

		while (true) {
			try {
				System.out.print("> ");
				int n = Integer.parseInt(System.console().readLine());
				int i = 0;

				while (n != 1) {
					System.out.print(n + " ");
					n = step(n);
					i++;
				}

				System.out.println(n + "\n\nIterations = " + i + "\n\n===============\n");
			} catch (NumberFormatException e) {
				System.out.println("NumberFormatException\n\n===============\n");
			}
		}
	}

	public static int step(int n) {
		if (n <= 0) return 1;
		else if (n % 2 == 0) return n / 2;
		else return n * 3 + 1;
	}
}