Solved Team mechanics in snowball fight plugin throws NPE

Discussion in 'Plugin Development' started by Hobbit9797, Feb 24, 2013.

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    You should set el.spiel to spiel instead of making another instance of Spiel, but I'm not sure if that is what's causing your problem.
    EDIT: Actually, I think it is causing your problem, because a new spiel would not have it's hsf initialized, so it would generate an NPE.
  3. You don't really understand what "new" does do you ? It's not a magic word to get the class you need, it creates a new instance of it, a clone, a copy, something like it but totally diferent !
    You should read some tutorials about Java instances.

    This is how it should be:

    // main class
    public void onEnable() {
      // create one instance of other classes and store them
      spiel = new Spiel();
      el = new EntityListener(this, spiel);
      // register the entity listener we stored...
      getServer().getPluginManager().registerEvents(el, this);
    // entity listener class
    public class EntityListener implements Listener {
      private Spiel spiel;
      private HobbitSnowFight hsf;
      public EntityListener(HobbitSnowFight hsf, Spiel spiel) {
        this.hsf = hsf;
        this.spiel = spiel;
      // events and stuff...
    Also, don't use Player as hashmap key, use player's name as String instead.

    Next, you're casting the entity to SnowBall *before* you're checking it, that will give you a nice error when something hits something else with anything but snowball...
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    OMG you guys are awesome!
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