singleton의 최적?

public class DataStore {

    private final String TAG = DataStore.class.getSimpleName();
    
    private DataStore() {
        Log.e(TAG, "Init");
    }

    public static DataStore getInstance() {
        return LazyDataStore.instance;
    }

    private static class LazyDataStore {
        private static final DataStore instance = new DataStore();
    }
    
}