@Override
	public List<Admin> getAdminByLastName(String name) {
		if(name == null){
			throw new NullPointerException("Name can not be null.");
		}
		List<Admin> result = new ArrayList<Admin>();
		
		List<Admin> allAdmins = this.getAdmin();

		for (int i = 0; i < allAdmins.size(); i++) {
			if (allAdmins.get(i).getLastName() == name) {
				result.add(allAdmins.get(i));
			}
		}
		return result;
		
	}