java static 方法 多线程 多线程调用static方法

class ticket extends Thread
{
	private static int tick = 100;
	public ticket(String name){super(name);};
	public void run()
	{
		while(tick>0)
		{
			System.out.println("sale : " + Thread.currentThread().getName() + " " +tick--); 
		}
	}
	
	public static void main(String[] args)
	{
		ticket t1=new ticket("t1");
		ticket t2=new ticket("t2");
		ticket t3=new ticket("t3");
		ticket t4=new ticket("t4");
		t1.start();
		t2.start();
		t3.start();
		t4.start();
		
	}
}