Zetcode.com Java: Spaceinvaders Player don't move anymore after I shot a bullet -

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i tried programm spaceinvaders tutorial: spaceinvaders

everything okay far, could'nt find out how set focus again on player after did shot. player not move anymore. tried allready couple of hours , know keyevents working - until shoot. (system.out.println - testing events ok)

i can move player fast befor shot, afterwards no chance. can shots again, vk_left` nor vk_right react anymore.

i work eclipse luna , java build 1.8.0_40, , use original code, made me little pngs. specified iterator<alien> = aliens.iterator(); , changed: // imageicon ii = new imageicon(this.getclass().getresource(shot)); to: 

imageicon ii = new imageicon(shot);

because otherwise nullpointer exception.

this tried in board.class: workes litte better, player still want move time want. bothers me is, works times , without can find reason, player stop , want move anymore.

 private class tadapter extends keyadapter {          @override         public void keyreleased(keyevent e) {                   //original code                 //player.keyreleased(e);              //works better, still not expected             if(ingame)             {                 if (e.getkeycode() == keyevent.vk_left || e.getkeycode() == keyevent.vk_right )                 {                     player.keyreleased(e);                  }                  if(e.getkeycode()== keyevent.vk_alt)                   {                      player.x += player.dx;                           if (player.x <= 2)                              player.x = 2;                         if (player.x >= board_width -2*player.width)                              player.x= board_width - 2*player.width;                   }             }          }

i hope can me. nice regards c.


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