如何使用Room创建数据库的新实例？

implementation "androidx.room:room-runtime:2.4.0"
annotationProcessor "androidx.room:room-compiler:2.4.0"

@Entity(tableName = "users")
public class User {
    @PrimaryKey
    public int id;
    public String name;
    public int age;
}

@Database(entities = {User.class}, version = 1)
public abstract class AppDatabase extends RoomDatabase {
    public abstract UserDao userDao();
}

@Dao
public interface UserDao {
    @Query("SELECT * FROM users")
    List<User> getAllUsers();

    @Insert
    void insertUser(User user);

    @Delete
    void deleteUser(User user);
}

AppDatabase db = Room.databaseBuilder(getApplicationContext(),
        AppDatabase.class, "my-database").build();