2016032804_线程的同步与死锁.docVIP

1、课程名称：线程的同步与死锁 2、知识点 2.1、上次课程的主要知识点 多线程的操作方法 2.2、本次预计讲解的知识点 1、 线程同步的产生与解决； 2、 死锁的问题。 3、具体内容（★★★★★） 3.1、同步的问题的引出 如果要想进行同步的操作，那么很明显就是多个线程需要访问同一资源。 范例：以卖票程序为例 package cn.mldn.demo; class MyThread implements Runnable { private int ticket = 5 ; @Override public void run() { for (int x = 0; x 10; x++) { if (this.ticket 0) { System.out.println(Thread.currentThread().getName() + ，ticket = + this.ticket--); } } } } public class TestDemo { public static void main(String args[]) throws Exception { MyThread mt = new MyThread() ; Thread t1 = new Thread(mt, 票贩子A); Thread t2 = new Thread(mt, 票贩子B); Thread t3 = new Thread(mt, 票贩子C); t1.start(); t2.start(); t3.start(); } } 票贩子A，ticket = 5 票贩子B，ticket = 4 票贩子C，ticket = 2 票贩子A，ticket = 3 票贩子B，ticket = 1 package cn.mldn.demo; class MyThread implements Runnable { private int ticket = 5 ; @Override public void run() { for (int x = 0; x 10; x++) { if (this.ticket 0) { try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + ，ticket = + this.ticket--); } } } } public class TestDemo { public static void main(String args[]) throws Exception { MyThread mt = new MyThread() ; Thread t1 = new Thread(mt, 票贩子A); Thread t2 = new Thread(mt, 票贩子B); Thread t3 = new Thread(mt, 票贩子C); t1.start(); t2.start(); t3.start(); } } 票贩子A，ticket = 5 票贩子B，ticket = 4 票贩子C，ticket = 3 票贩子A，ticket = 2 票贩子B，ticket = 1 票贩子C，ticket = 0 票贩子A，ticket = -1 class MyThread implements Runnable { private int ticket = 5 ; @Override public void run() { for (int x = 0; x 10; x++) { synchronized(this) { // 同步代码块 if (this.ticket 0) { try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + ，ticket = + this.ticket--); } } } } }class MyThread implements Runnable