import java.util.ArrayList;
import java.util.List;

public class UserUtil {

	private static List<User> list = new ArrayList<User>();
	public static void addUser(User user){
		if(!list.contains(user)) list.add(user);
	}
	public static void removeUser(User user){
		if(list.contains(user)) list.remove(user);
	}
	public static List<User> getList(){
		return list;
	}
	public static User get(String name){
		for(User user : UserUtil.getList()){
			if(user.getName().equalsIgnoreCase(name)) return user;
		}
		return new User(name);
	}
}