Java多线程编程：死锁问题实例-蒲公英云

Java多线程编程：死锁问题实例

原创秒速五厘米 2024-10-22 04:15 153阅读 0赞

死锁是多线程编程中的一个重要问题。当两个或更多的线程在执行过程中，因争夺资源而造成的一种相互等待的现象时，就可能出现死锁。

下面是一个简单的Java多线程死锁实例：

// 定义资源
class Resource {
    private int count;
    Resource(int count) {
        this.count = count;
    }
    synchronized void acquire() {
        if (count == 0) {
            throw new InterruptedException("资源已耗尽");
        }
        count--;
    }
    synchronized void release() {
        count++;
    }
}
// 定义线程
class ThreadA extends Thread {
    private Resource resource;
    ThreadA(Resource resource) {
        this.resource = resource;
    }
    public void run() {
        try {
            // 资源1
            resource.acquire();
            System.out.println("Thread A acquired resource 1");
            // 资源2
            resource.acquire();
            System.out.println("Thread A acquired resource 2");
            // 释放资源
            resource.release();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
public class Main {
    public static void main(String[] args) {
        Resource resource1 = new Resource(1);
        Resource resource2 = new Resource(1);
        ThreadA threadA1 = new ThreadA(resource1);
        ThreadA threadA2 = new ThreadA(resource2);
        threadA1.start();
        threadA2.start();
    }
}