@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + aantalDeelnames;
		result = prime * result + id;
		result = prime * result
				+ ((leerjaar == null) ? 0 : leerjaar.hashCode());
		result = prime * result + ((leraar == null) ? 0 : leraar.hashCode());
		result = prime * result
				+ ((onderwerp == null) ? 0 : onderwerp.hashCode());
		result = prime * result
				+ ((opdrachten == null) ? 0 : opdrachten.hashCode());
		result = prime * result
				+ ((quizStatus == null) ? 0 : quizStatus.hashCode());
		return result;
	}