uni/inf1010/hw1/Bol.java

class Bol<T> {
	private T dyr;

	Bol() {
		this.dyr = null;
	}

	Bol(T dyr) {
		this.dyr = dyr;
	}

	public boolean erTomt() {
		return dyr == null;
	}

	public void settInn(T dyr) throws Exception {
		if (!erTomt()) {
			throw new Exception("Bolet er ikke tomt!");
		}

		this.dyr = dyr;
	}

	public T hent() throws Exception {
		return dyr;
	}
}