多线程(多窗口卖票实例讲解)

package com.demo.study.multithreading;

public class MyThread extends Thread{

 private int i = 10;
 // 可以自行定义锁，也可以使用实例的锁
 Object mutex = new Object();
 public void selltickets(){
 
 synchronized (mutex) {
 
 if(i>0){
  i--;
  //getName()获取线程的名字
  System.out.println(Thread.currentThread().getName()+" :"+ i);
 }
 }
 }
 
 @Override
 public void run() {
 while(i>0){
  
  selltickets();
 }
 }
}

package com.demo.study.multithreading;

public class Test {

 public static void main(String[] args) {
//继承Thread方式：多线程多实例，无法实现资源的共享
 MyThread myThread1 = new MyThread();
 MyThread myThread2 = new MyThread();
 //给线程命名
 myThread1.setName("线程1");
 myThread2.setName("线程2");
 myThread1.start();
 myThread2.start();
 }
}

package com.demo.study.multithreading;

public class MyThreadImpl implements Runnable {

 private int tickets = 10;

 public void sellTickets() {

 synchronized (MyThreadImpl.class) {
  if (tickets > 0) {

  tickets--;
  System.out.println(Thread.currentThread().getName() + "正在卖票，还剩下" + tickets + "张");
  }
 }
 }

 @Override
 public void run() {

 while (tickets > 0) {
  sellTickets();
  try {
  // 休眠一秒，让执行的效果更明显
  Thread.sleep(100);
  } catch (InterruptedException e) {
  e.printStackTrace();
  }
 }
 }
}

package com.demo.study.multithreading;

public class Test {

 public static void main(String[] args) {

 //只创建一个实例
 MyThreadImpl threadImpl = new MyThreadImpl();
 //将上面创建的唯一实例放入多个线程中，Thread类提供了多个构造方法，见下图（构造方法摘要）
 Thread thread1 = new Thread(threadImpl, "窗口1");
 Thread thread2 = new Thread(threadImpl, "窗口2");
 thread1.start();
 thread2.start();
 
 }
}