Method sendMessageToGroupChat

java/Chapter 8/Question8_7/User.java:35–42

(int groupId, String content)

	}
	
	public boolean sendMessageToGroupChat(int groupId, String content) {
		GroupChat chat = groupChats.get(groupId);
		if (chat != null) {
			Message message = new Message(content, new Date());
			return chat.addMessage(message);
		}
		return false;
	}
	
	public void setStatus(UserStatus status) {
		this.status = status;