JAVA线程sleep和wait方法区别 代码

package test;

import java.util.Date;
import java.util.Random;

public class test {

    public static void main(String[] args) {
        TicketThread thread = new TicketThread();

        for (int i = 0; i < 10; i++) {
            new Thread(thread, "client-" + (i + 1)).start();
        }
    }

    public static class TicketThread implements Runnable {
        private int stock = 10;
        private Object lock = new Object();

        public void run() {
            while (stock > 0) {
                synchronized (lock) {
                    if (stock > 0) {
                        try {
                            Integer processingTime = new Random().nextInt(1000);
                            System.out.println(Thread.currentThread().getName() + ":订单处理中..."+ stock + new Date());
                            Thread.sleep(processingTime);
                            System.out.println(Thread.currentThread().getName() + "：交易成功，库存余量：" + --stock + new Date());
                            lock.wait(12000);   //释放锁，其余的线程不等待12秒，直接去打印
                            //Thread.sleep(12000);  锁不放，其余的线程不能打印，等待12秒出一个打印
                            System.out.println(Thread.currentThread().getName() + "：睡眠结束...：" + stock + new Date());
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

}