WhyIHate.java

/**
 * The main entry point.
 *
 * TODO Turn this into a Servlet.
 */
public class WhyIHate/*Java*/ {
	private static final int TWENTY = 20; // Magic numbers are bad.

	// TODO Create a wrapper class to protect i from invalid accesses.
	// TODO Create a factory for that wrapper class -- you never know when we
	//      might need to upgrade the data model.
	private static int i = TWENTY;

	public static void main(String ... args) {
		while(i != 1) {
			// TODO Ideally, we'd hide the math here in an inner class. Or
			// better yet, create an IIterativeComputation interface and an
			// AbstractIterativeComputation class implementing it, then a
			// CollatzIterativeComputation class with a
			// CollatzIterativeComputationBuilder and/or a
			// CollatzIterativeComputationFactory to allow for easy
			// construction.
			i = i % 2 == 0
				? i / 2
				: i * 3 + 1;

			// TODO Create a proper output stream delegate bean interface.
			System.out.println(i);
		}
	}
}