package generischer_binaerbaum;

public abstract class Node<E extends Comparable<E>> {
	protected final E elem;
	
	public Node(E e) {
		super();
		
		if (e == null)
			throw new IllegalArgumentException("not allowed");
		
		elem = e;
	}
	
	public boolean contains(E e) {
		return e.compareTo(elem) == 0;
	}
	
	public abstract Node<E> append(E e);
	public abstract boolean equals(Object o);

	public String toString() {
		return elem.toString()+ ", ";
	}
}