nosynchronizedemo.java

java入门经典教程 java入门经典教程 java入门经典教程

// 例4.5.1 NoSynchronizeDemo.java
class SaleTickets implements Runnable
{	
	private String ticketNo = "100750";  // 车票编号
private int ticket = 1;  // 共享私有成员，编号为100750的车票数量为1
	public void run()
	{
		System.out.println(Thread.currentThread().getName()+" is saling 
Ticket "+ticketNo);  // 当前系统正在处理订票业务
		if(ticket>0)
{
		 	try   // 休眠0-1000毫秒，用来模拟网络延迟
{ 
				Thread.sleep((int)(Math.random()*1000));
			}catch(InterruptedException e){
				e.printStackTrace();
}
			ticket=ticket-1;     // 修改车票数据库的信息
// 显示当前该车票的预订情况
			System.out.println("ticket's amount is left: "+ticket);
			
		}
		else
// 显示该车票已被预订
System.out.println("Sorry,Ticket "+ticketNo+" is saled");
			
	}
}
class NoSynchronizeDemo   // 创建两个线程模拟两个订票系统的订票过程
{
	public static void main(String[] args)
	{
		SaleTickets m = new SaleTickets();
		Thread t1 = new Thread(m,"System 1"); 
		Thread t2 = new Thread(m,"System 2");
		t1.start();
		t2.start();
	}
}