Java多线程编程中的线程死锁的问题解决

public class DeadlockDemo {
    public static void main(String[] args) {
        final Object resource1 = "resource1";
        final Object resource2 = "resource2";
        Thread thread1 = new Thread(() -> {
            synchronized (resource1) {
                System.out.println("Thread 1: Holding resource 1...");
                try { Thread.sleep(100); } catch (InterruptedException e) {}
                System.out.println("Thread 1: Waiting for resource 2...");
                synchronized (resource2) {
                    System.out.println("Thread 1: Holding resource 1 and 2...");
                }
            }
        });
        Thread thread2 = new Thread(() -> {
            synchronized (resource2) {
                System.out.println("Thread 2: Holding resource 2...");
                try { Thread.sleep(100); } catch (InterruptedException e) {}
                System.out.println("Thread 2: Waiting for resource 1...");
                synchronized (resource1) {
                    System.out.println("Thread 2: Holding resource 1 and 2...");
                }
            }
        });
        thread1.start();
        thread2.start();
    }
}

public class DiningPhilosophersDeadlock {
    public static class Philosopher extends Thread {
        private Object leftFork;
        private Object rightFork;
        public Philosopher(Object leftFork, Object rightFork) {
            this.leftFork = leftFork;
            this.rightFork = rightFork;
        }
        public void run() {
            synchronized (leftFork) {
                System.out.println(Thread.currentThread().getName() + " 拿起左叉子");
                try {
                    Thread.sleep(100); // 模拟思考时间
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                synchronized (rightFork) {
                    System.out.println(Thread.currentThread().getName() + " 拿起右叉子，开始进食");
                }
            }
        }
    }
    public static void main(String[] args) {
        int numPhilosophers = 5;
        Philosopher[] philosophers = new Philosopher[numPhilosophers];
        Object[] forks = new Object[numPhilosophers];
        for (int i = 0; i < numPhilosophers; i++) {
            forks[i] = new Object();
        }
        for (int i = 0; i < numPhilosophers; i++) {
            Object leftFork = forks[i];
            Object rightFork = forks[(i + 1) % numPhilosophers];
            philosophers[i] = new Philosopher(leftFork, rightFork);
            philosophers[i].start();
        }
    }
}