public boolean containsElement(ElementType elementType) {
if (type.equals(elementType)
|| (leftChild != null && leftChild.containsElement(elementType))
|| (rightChild != null && rightChild.containsElement(elementType))) {
return true;
}
return false;
}
/**
* Returns <CODE>true</CODE> if Element is a halogen (F, Cl, Br, I, At).
*
* @return <CODE>true</CODE> if Element is a halogen.
*/
public boolean isHalogen() {
return elementType.equals(ElementType.HALOGEN);
}