please explain me the flow of this program

class Bticket extends Thread { Object train,comp; Bticket(Object train,Object comp){ this.train=train; this.comp=comp; } public void run(){ synchronized(train){ System.out.println("bookticket locked on train"); try{ Thread.sleep(200);} catch(InterruptedException ie){} } System.out.println("bookticket now waiting to lock on comp"); synchronized(comp){ System.out.println("bookticket locked on comp");

}
}
}
class Cticket extends Thread

{ Object train,comp; Cticket(Object train,Object comp){ this.train=train; this.comp=comp; } public void run(){ synchronized(train){ System.out.println("cancellticket locked on train"); try{ Thread.sleep(200);} catch(InterruptedException ie){} } System.out.println("cancellticket now waiting to lock on comp"); synchronized(comp){ System.out.println("cancelticket locked on comp");

}
}

}

class Deadlock1 { public static void main(String[] args) { Object tr = new Object(); Object compartment =new Object(); Bticket bt=new Bticket(tr,compartment); Cticket ct = new Cticket(tr,compartment); Thread t1=new Thread(bt); Thread t2 = new Thread(ct); t1.start(); t2.start(); } }