public boolean equals(Object anObject) {
		if (this == anObject) {
		    return true;
		}
		if (anObject instanceof LinkMan) {
		    LinkMan anotherLinkMan = (LinkMan)anObject;
			if(this.name.equals(anotherLinkMan.getName())
					&& this.address.equals(anotherLinkMan.getAddress())
					&& this.mobilePhone.equals(anotherLinkMan.getMobilePhone())
					&& this.email.equals(anotherLinkMan.getEmail())
					&& this.ground == anotherLinkMan.getGround())
			return true;
		    }
		return false;
	}