package com;import java.io.IOException;
import java.nio.CharBuffer;public class Demo04 {public static void main(String[] args) {/*    MyThread t1 = new MyThread();t1.setName("线程一");MyThread t2 = new MyThread();t2.setName("线程二");MyThread t3 = new MyThread();t3.setName("线程三");MyThread t4 = new MyThread();t4.setName("线程四");t1.start();t2.start();t3.start();t4.start();*/test02();}public static  void test02(){MyThread02 thread02 = new MyThread02();Thread t1 = new Thread(thread02);t1.setName("线程一");Thread t2 = new Thread(thread02);t2.setName("线程二");Thread t3 = new Thread(thread02);t3.setName("线程三");Thread t4 = new Thread(thread02);t4.setName("线程四");t1.start();t2.start();t3.start();t4.start();}
}/*** 实现多线程的一种方式，继承Thread类，因为java类只能单继承，当不能使用继承时。就使用下面的另一个方式* @author Administrator**/
class MyThread extends Thread{//模拟一个多线程的Demo//定一个票数为100；private static int sum=100;@Overridepublic void run() {//采用同步代码块实现线程安全while (true) {                synchronized (MyThread02.class) {if(sum<=0){return;}sum--;System.out.println(Thread.currentThread().getName()+"售出一张票；还剩余"+sum+"张");}    }}}
/*** 实现多线程的第二种方式；实现Runnable接口* * @author Administrator**/
class MyThread02 implements Runnable{//模拟一个多线程的Demo//定一个票数为100；private static int sum=100;@Overridepublic void run() {//采用同步代码块实现线程安全while (true) {synchronized (MyThread02.class) {if(sum<=0){return;}sum--;System.out.println(Thread.currentThread().getName()+"售出一张票；还剩余"+sum+"张");}    }}    }