AdvancementAPI

Example

public class CobblestoneAdvancement implements AdvancementCreator {
 public static final String ID = "some_cobblestone";
 
 @Override
 public @NotNull Advancement create(@NotNull Context context) {
 
 Advancement advancement = new Advancement(context.getPlugin(), ID);
 advancement.setDisplay(x -> {
 x.setTitle("Some Cobblestone");
 x.setDescription("Get 3 cobblestone");
 x.setBackground(BackgroundType.STONE);
 x.setIcon(Material.COBBLESTONE);
 });
 advancement.addCriteria("cobblestone", TriggerType.INVENTORY_CHANGED, trigger -> {
 trigger.hasItemMatching(item -> {
 item.setType(Material.COBBLESTONE);
 item.setCount(3);
 });
 });
 
 return advancement;
 }
}

public class StonePickaxeAdvancement implements AdvancementCreator {
 public static final String ID = "stone_pickaxe";
 @Override
 public @NotNull Advancement create(@NotNull Context context) {
 Advancement advancement = new Advancement(context.getPlugin(), ID);
 advancement.setParent(new NamespacedKey(context.getPlugin(), CobblestoneAdvancement.ID));
 advancement.setDisplay(x -> {
 x.setTitle("Stone Pickaxe");
 x.setDescription("Craft a stone pickaxe with your 3 cobblestone");
 x.setIcon(Material.STONE_PICKAXE);
 });
 advancement.addCriteria("pickaxe", TriggerType.INVENTORY_CHANGED, trigger -> {
 trigger.hasItem(Material.STONE_PICKAXE);
 });
 return advancement;
 }
}

public class MyPlugin extends JavaPlugin {
 private final AdvancementManager manager = new AdvancementManager(this);
 @Override
 public void onEnable() {
 manager.register(new CobblestoneAdvancement());
 manager.register(new StonePickaxeAdvancement());
 
 manager.createAll();
 }
}