チケット購入手続き

package mythread.tickets;

public class Tickets implements Runnable
{
	static int tickets = 100;
	Object o = new Object();
	boolean isSell = false;
	public void run()
	{
		// TODO Auto-generated method stub

		if(!isSell)
		{
			while(true)
			{	
				synchronized(this.getClass())
				{
					if(tickets>0)
					{
						try
						{
							Thread.sleep(1);
						} catch (InterruptedException e)
						{
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
						System.out.println(Thread.currentThread().getName()+" "+tickets+" ");
						tickets--;
					}
					else
					{
						break;
					}
				}
			}
		}
		else
		{
			while(true)
			{
				if(!sell())
				{
					break;
				}
			}
		}
	}
	
	public static synchronized boolean sell()
	{
		if(tickets>0)
		{
			try
			{
				Thread.sleep(1);
			} catch (InterruptedException e)
			{
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			System.out.println(Thread.currentThread().getName()+" sell() "+tickets+" ");
			tickets--;
			return true;
		}		
		else
		{
			return false;
		}
	}
	
}

package mythread.tickets;

public class TicketsTest
{
	
	public static void main(String[] args)
	{
		Tickets t = new Tickets();
		new Thread(t," ").start();
		try
		{
			Thread.sleep(1);
		} catch (InterruptedException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		t.isSell = true;
		new Thread(t," ").start();
//		new Thread(t," ").start();
//		new Thread(t," ").start();
	}
}