创建两个线程实现奇数和偶数的交替输出Java代码

创建两个线程在Java中交替输出奇数和偶数可以使用`Thread`类、`Runnable`接口或者`Callable`接口配合`FutureTask`。这里我将展示如何使用`Runnable`接口的示例：

import java.util.concurrent.*;

public class OddEvenThread {
    private int number = 0;
    private final Object lock = new Object(); // 用于同步两个线程

    public class OddThread implements Runnable {
        @Override
        public void run() {
            while (true) {
                synchronized (lock) {
                    if (number % 2 == 0) { // 如果是偶数，其他线程会先持有锁，跳过打印
                        try {
                            lock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    } else { // 打印奇数并唤醒等待的偶数线程
                        System.out.println(Thread.currentThread().getName() + ": " + number++);
                        lock.notifyOne(); // 唤醒等待的线程
                    }
                }
            }
        }
    }

    public class EvenThread extends OddThread implements Runnable {
        @Override
        public void run() {
            while (true) {
                synchronized (lock) {
                    if (number % 2 != 0) { // 如果是奇数，打印并唤醒等待的奇数线程
                        System.out.println(Thread.currentThread().getName() + ": " + number++);
                        lock.notifyOne(); // 唤醒等待的线程
                    } else {
                        try {
                            lock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        ExecutorService executor = Executors.newFixedThreadPool(2);
        executor.execute(new OddEvenThread().new OddThread());
        executor.execute(new OddEvenThread().new EvenThread());
        executor.shutdown();
    }
}