Java로 개발된 메시지 알림 애플리케이션

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

public class NotificationApp {
    private List<Message> messages;
    private NotificationListener notificationListener;
    
    public NotificationApp() {
        messages = new ArrayList<>();
        notificationListener = new NotificationListener();
    }
    
    public void pushMessage(Message message) {
        messages.add(message);
        notificationListener.onMessageReceived(message);
    }
    
    public void setNotificationListener(NotificationListener listener) {
        this.notificationListener = listener;
    }
    
    public List<Message> getUnreadMessages() {
        List<Message> unreadMessages = new ArrayList<>();
        for (Message message : messages) {
            if (!message.isRead()) {
                unreadMessages.add(message);
            }
        }
        return unreadMessages;
    }
    
    public static void main(String[] args) {
        NotificationApp app = new NotificationApp();
        
        // 设置消息提醒方式为弹窗
        app.setNotificationListener(new PopupNotificationListener());
        
        // 模拟接收消息
        Message message1 = new Message("1", "这是一条重要消息", false);
        app.pushMessage(message1);
        Message message2 = new Message("2", "这是一条普通消息", false);
        app.pushMessage(message2);
        
        // 查看未读消息
        List<Message> unreadMessages = app.getUnreadMessages();
        for (Message message : unreadMessages) {
            System.out.println("未读消息：" + message.getContent());
        }
        
        // 将消息设置为已读
        message1.setRead(true);
        
        // 再次查看未读消息
        unreadMessages = app.getUnreadMessages();
        for (Message message : unreadMessages) {
            System.out.println("未读消息：" + message.getContent());
        }
    }
}

class Message {
    private String id;
    private String content;
    private boolean read;
    
    public Message(String id, String content, boolean read) {
        this.id = id;
        this.content = content;
        this.read = read;
    }
    
    public String getId() {
        return id;
    }
    
    public String getContent() {
        return content;
    }
    
    public boolean isRead() {
        return read;
    }
    
    public void setRead(boolean read) {
        this.read = read;
    }
}

interface NotificationListener {
    void onMessageReceived(Message message);
}

class PopupNotificationListener implements NotificationListener {
    @Override
    public void onMessageReceived(Message message) {
        System.out.println("收到新消息弹窗提醒：" + message.getContent());
    }
}