代码一:
public class TestThread {
public static void main(String[] args) {
// TODO Auto-generated method stub
Test t=new Test();
Test t1=new Test();
Test t2=new Test();
t.start();
t1.start();
t2.start();
}
}
//class Test extends Thread
class Test extends Thread
{
private int num=50;
private Dog myDog=new Dog();
public void run()
{
while(true)
{
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
synchronized (myDog) {
if(num>0)
{
System.out.println(this.getName()+"正在售出第"+num+"张票");
num--;
}else
{
break;
}
}
}
}
}
class Dog
{
}
**代码二:**
public class TestThread {
public static void main(String[] args) {
//定义一个售票窗口
TicketWindow tw1=new TicketWindow();
//使用三个线程同时启动
Thread t1=new Thread(tw1);
Thread t2=new Thread(tw1);
Thread t3=new Thread(tw1);
t1.start();
t2.start();
t3.start();
}
}
//售票窗口类
class TicketWindow implements Runnable {
//共有2000张票
private int nums=2000;
private Dog myDog=new Dog();
public void run() {
while(true){
//出票速度是1秒出一张
try {
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
//认为if else要保证其原子性
//先判断是否还有票
synchronized(myDog){
if(nums>0){
//显示售票信息
//Thread.currentThread().getName()得到当前线程的名字
System.out.println(Thread.currentThread().getName()+"正在售出第"+nums+"张票");
nums--;
}else{
//售票结束
break;
}
}
}
}
}
class Dog{
}
俩种代码的区别是什么?求大神指点。运行结果完全不同。