public class Main extends JavaPlugin {

    @Override
    public void onEnable ( ) {
        // Default directory: YourPlugin/configuration/
        SimpleJSONConfig. INSTANCE. register ( this ) ;
       
        // Use YAML instead of JSON
        SimpleJSONConfig. INSTANCE. register ( this, StoreType. YAML ) ;
       
        // Specify custom directory
        SimpleJSONConfig. INSTANCE. register ( this, new File ( "default/config/directory" ) ) ;
    }
}
 

@Getter
@Configuration ( "config" ) // or config.json / path/to/config
@SuppressWarnings ( "FieldMayBeFinal" ) // no final modifiers yet
public class MyConfig extends Config {

    private String joinMessage = "Default join message" ;

    private List <ItemStack > startingEquipment = new ArrayList <> (
        Collections. singletonList ( new ItemStack (Material. DIRT ) )
    ) ;

    @Comment ( "This comment will appear in the config file too" )
    private YourType something ;
}
 

// Option 1: Get directly
private MyConfig config = Config. getConfig (MyConfig. class ) ;

// Option 2: Autowire into static field
@Autowired
private static MyConfig config ;
 

@Stored (value = "directory", storeType = StoreType. JSON )
public class MyClass implements Identifiable <UUID > {

    private final UUID id ;
    private int count ;

    @Override
    public UUID getId ( ) {
        return id ;
    }
}
 

private static Service <UUID, MyClass > service = Service. getService (MyClass. class ) ;

public void foo ( ) {
    MyClass obj = new MyClass (UUID. randomUUID ( ) ) ;
    service. save (obj ) ; // serialize to file
    MyClass loaded = service. getById (obj. getId ( ) ) ;
    List <MyClass > matching = service. getMatching (c -> c. getCount ( ) > 10 ) ;
    service. delete (obj ) ;
}