java - Difference between calling stop from applet menu and restart in appletviewer -

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 have animation program using threads , applet.

when call stop option applet menu in appletviewer program works when press restart there abnormality in working. thread not come out of while loop on calling restart @ line no.34

   class saver     {     .        .         public void run()         {         system.out.println("run "+thread.currentthread().getname());          func();         system.out.println("out of synchronized block");         }         synchronized public void func()         {         int i;         while(running)         {         for(i=0;i<4;i++)         {         gap[i]+=10;         if(gap[i]==360)         gap[i]=0;         system.out.println(thread.currentthread().getname());         calc(gap[i],400,i%2==0?(byte)1:(byte)-1);         yb[i]=(int)(y)+yc;         xb[i]=(int)(x)+xc;       }         repaint();          try                              {                             thread.sleep(1000);                    }                       catch(exception e)         {}          }          system.out.println("out of while in synchronized block");//not being printed         }


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