【Java】【OS】操作系统理发店问题通过应用小程序动态实现

以下是一个简化的Java代码示例，用于模拟操作系统中的理发店问题。这个例子中，我们假设有一个理发店有一个理发师和一个等候区，理发师在等候区有客户时开始理发。

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
 
public class BarbershopProblem {
 
    public static void main(String[] args) {
        BlockingQueue<Customer> waitingRoom = new LinkedBlockingQueue<>();
 
        Thread barberThread = new Thread(new Barber(waitingRoom));
        barberThread.start();
 
        for (int i = 0; i < 10; i++) {
            Customer customer = new Customer(i, waitingRoom);
            Thread customerThread = new Thread(customer);
            customerThread.start();
        }
    }
}
 
class Barber implements Runnable {
    private final BlockingQueue<Customer> waitingRoom;
 
    public Barber(BlockingQueue<Customer> waitingRoom) {
        this.waitingRoom = waitingRoom;
    }
 
    @Override
    public void run() {
        try {
            while (true) {
                Customer customer = waitingRoom.take();
                System.out.println("理发师开始为客户 " + customer.id + " 理发");
                // 模拟理发过程
                Thread.sleep(1000 + (long) (Math.random() * 1000));
                System.out.println("客户 " + customer.id + " 理发完毕");
            }
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}
 
class Customer implements Runnable {
    public final int id;
    private final BlockingQueue<Customer> waitingRoom;
 
    public Customer(int id, BlockingQueue<Customer> waitingRoom) {
        this.id = id;
        this.waitingRoom = waitingRoom;
    }
 
    @Override
    public void run() {
        try {
            System.out.println("客户 " + id + " 等待理发");
            waitingRoom.put(this);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
}

这段代码模拟了理发店问题。理发师（Barber）是一个无限循环，不断从等候区（waitingRoom）中取出客户（Customer）进行理发。每个客户（Customer）是一个线程，它们在等候区等待被理发师服务。这个简化的例子使用了BlockingQueue来实现等候区，并且使用线程来模拟并发。