Problem: I'm writing a pile of Java code and want a quick way to mark some bit of code as incomplete, but I also want it to compile so that I can mess with the parts that are working!

Solution:

	static <T> T todo(String message) {
		throw new RuntimeException("TODO: "+message);
	}

	public static void main(String[] args) {
		System.out.println("Hello, world!");
		todo("Decide what this program should do and write it.");
	}