java三个线程交替打印1-100

在Java中，我们可以使用`Thread.sleep()`方法以及`synchronized`关键字来创建并控制三个线程交替打印数字1到100。下面是一个简单的示例：

public class PrintNumber {
    private int count = 1;
    private final Object lock = new Object();

    public class Worker implements Runnable {
        @Override
        public void run() {
            for (int i = 0; i < 34; i++) { // 每个线程打印34次，保证1-100
                synchronized (lock) {
                    if (count > 100) {
                        break;
                    }
                    System.out.println(Thread.currentThread().getName() + ": " + count++);
                    try {
                        lock.notify(); // 醒来下一个线程
                        lock.wait(50); // 等待50毫秒
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        PrintNumber printNum = new PrintNumber();
        Thread t1 = new Thread(printNum.new Worker(), "Thread 1");
        Thread t2 = new Thread(printNum.new Worker(), "Thread 2");
        Thread t3 = new Thread(printNum.new Worker(), "Thread 3");

        t1.start();
        t2.start();
        t3.start();