{
@EventHandler
public void onEntityExplode(EntityExplodeEvent e)
{
  Calendar c = Calendar.getInstance();
  int hr = c.get(11);
  if (((hr >= 24) || (hr < 12)) && (e.getEntity().getType().equals(EntityType.PRIMED_TNT))) {
    e.setCancelled(true);
  }
}

@EventHandler(priority=EventPriority.HIGHEST)
public void onBlock(BlockPlaceEvent e)
{
  Player p = e.getPlayer();
  Material m = e.getBlock().getType();
  Location l = e.getBlock().getLocation();
  int y = l.getBlockY();
  if (m == Material.TNT) {
    if (y > 50) {
      e.setCancelled(true);
      p.sendMessage(ChatUtil.fixColor("§4Blad: §cTnT mozna stawiac od 50 kratki"));
    }
  }
} 
@EventHandler
public void onPlayerClick(PlayerInteractEvent e)
{
  Player p = e.getPlayer();
  if ((e.getAction() == Action.RIGHT_CLICK_BLOCK) && 
    (p.getItemInHand().getType().equals(Material.EXPLOSIVE_MINECART)) && 
    (p.getLocation().getY() > 50.0D))
  {
	  p.sendMessage(ChatUtil.fixColor( "&4Blad: &cMinecart z TNT mozna stawiac tylko od 50 poziomu w dol."));
    e.setCancelled(true);
    return;
  }
}
@EventHandler
public void onTNTPlace(BlockPlaceEvent e)
{
  Material m = e.getBlockPlaced().getType();
  Player p = e.getPlayer();
  
  Calendar c = Calendar.getInstance();
  int hr = c.get(11);
  if ((m == Material.TNT) && ((hr >= 24) || (hr < 12)))
  {
    e.setCancelled(true);
    p.sendMessage(ChatUtil.fixColor("§4TNT §7dziala w godzinach §c10:00 §7- §c22:00"));
  }
}
}