public static void main(String[] args)...{
SellThread st=new SellThread(); new Thread(st).start();
try...{ Thread.sleep(1); }catch(Exception e)...{ e.printStackTrace();
} st.bool=true; new Thread(st).start(); }
}
class SellThread implements Runnable...{ int tickets=20; Object obj=new Object(); boolean bool=false; public void run()...{
