Java threads as much as selling a ticket window problem (Runnable)

/ ** 
* Example: Create three window selling tickets, the total number of votes for the 100 that implement Runnable interface mode 
* thread security problems, to be resolved. 
* / 
Class the Window1 the implements the Runnable { 

    Private int Ticket = 100; 

    @Override 
    public void RUN () { 
        the while (to true) { 
            IF (Ticket> 0) { 
                . System.out.println (Thread.currentThread () getName () + " : selling a ticket, the ticket number is: "ticket +); 
                ticket--; 
            } the else { 
                BREAK; 
            } 
        } 
    } 
} 


public class WindowTest1 { 
    public static void main (String [] args) { 
        the Window1 the Window1 new new = W (); 

        the Thread t1 = new Thread (w);
        Thread t2 = new Thread(w);
        Thread t3 = new Thread(w);

        t1.setName("窗口1");
        t2.setName("窗口2");
        t3.setName("窗口3");

        t1.start();
        t2.start();
        t3.start();
    }

}