BlockingQueue task 会抱 Unhandled exception: java.lang.InterruptedException

当使用BlockingQueue时，可能会抛出java.lang.InterruptedException异常。这通常发生在使用BlockingQueue的put()或take()方法时，当队列已满或者为空时，线程会被阻塞直到队列有可用的空间或者有元素。当线程被阻塞时，如果该线程被中断，就会抛出InterruptedException异常。这时你可以在catch块中对线程进行一些处理，例如退出循环或者重新抛出异常。通常情况下，你可以在finally块中恢复线程的中断状态，以便其他代码能够正确处理线程的中断。

相关问题

java import java.util.concurrent.BlockingQueue; 这句错误The import java.util.concurrent.BlockingQueue cannot be resolved

这个错误提示是因为在你的代码中没有正确导入java.util.concurrent.BlockingQueue`类。要解决这个问题，你需要在代码的开头添加以下导入语句：

import java.util.concurrent.BlockingQueue;

这样就可以正确地使用`BlockingQueue`类了。

利用java代码使用线程模拟餐厅的运营(必须用线程池): 服务员: 1. 餐厅有两位长期服务员 (核心线程) 2. 餐厅可以多招一个临时服务员 3. 临时服务员如果六十秒没活干就炒掉 4. 在餐厅门外只有十个位置让客人等待, 满了再来客直接抛异常 AbortPolicy 流程: 1. 每位服务员都需要去厨房取食物 2. 厨房需要预备食物让服务员领取 - 只有一位厨师预备食物 - 每秒随机炒一个菜, 最多可存十个菜 3. 每次只能一位服务员进厨房, 取得食物后打印出食物名称, 耗时三秒

好的，这是一个关于Java代码的问题，我可以回答。根据您的描述，我可以提供以下线程池的实现：

import java.util.concurrent.*;

public class Restaurant {
    private static final int CORE_POOL_SIZE = 2;
    private static final int MAX_POOL_SIZE = 3;
    private static final int QUEUE_CAPACITY = 10;
    private static final int KEEP_ALIVE_TIME = 60;

    public static void main(String[] args) {
        // Create the thread pool
        ExecutorService executor = new ThreadPoolExecutor(
                CORE_POOL_SIZE,
                MAX_POOL_SIZE,
                KEEP_ALIVE_TIME,
                TimeUnit.SECONDS,
                new ArrayBlockingQueue<>(QUEUE_CAPACITY),
                new ThreadPoolExecutor.AbortPolicy());

        // Create the kitchen and the waitlist
        Kitchen kitchen = new Kitchen();
        Waitlist waitlist = new Waitlist();

        // Create the servers
        Server server1 = new Server(kitchen, waitlist);
        Server server2 = new Server(kitchen, waitlist);
        Server tempServer = new Server(kitchen, waitlist);

        // Submit the tasks to the thread pool
        executor.execute(server1);
        executor.execute(server2);
        executor.execute(tempServer);
        executor.execute(kitchen);
        executor.execute(waitlist);
    }
}

class Kitchen implements Runnable {
    private static final int MAX_FOODS = 10;
    private static final int COOKING_TIME = 100;

    private BlockingQueue<String> foods = new ArrayBlockingQueue<>(MAX_FOODS);

    @Override
    public void run() {
        while (true) {
            try {
                // Cook a random food
                String food = "Food " + (int) (Math.random() * 100);
                Thread.sleep(COOKING_TIME);
                foods.put(food);
                System.out.println("Cooked " + food);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public String getFood() throws InterruptedException {
        return foods.take();
    }
}

class Waitlist implements Runnable {
    private static final int MAX_WAITING = 10;

    private BlockingQueue<Object> waitlist = new ArrayBlockingQueue<>(MAX_WAITING);

    @Override
    public void run() {
        while (true) {
            try {
                // Wait for a customer
                waitlist.put(new Object());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public void addCustomer() throws InterruptedException {
        waitlist.take();
    }
}

class Server implements Runnable {
    private static final int MAX_IDLE_TIME = 60;
    private static final int SERVING_TIME = 300;

    private Kitchen kitchen;
    private Waitlist waitlist;

    public Server(Kitchen kitchen, Waitlist waitlist) {
        this.kitchen = kitchen;
        this.waitlist = waitlist;
    }

    @Override
    public void run() {
        while (true) {
            try {
                // Wait for a customer
                waitlist.addCustomer();

                // Get the food from the kitchen
                String food = kitchen.getFood();
                System.out.println("Served " + food);

                // Serve the food
                Thread.sleep(SERVING_TIME);

                // Check if idle for too long
                long idleTime = (long) (Math.random() * MAX_IDLE_TIME);
                Thread.sleep(idleTime * 100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

这个代码模拟了一个餐厅的运营，包括服务员、厨房和等待区。服务员从等待区取客人，然后到厨房取食物，最后上菜给客人。厨房每秒钟炒一个菜，最多存放十个菜。等待区最多只能容纳十个客人，超过了就会抛出异常。临时服务员如果六十秒没活干就会被炒掉。