Sample

DriveTrain.java

public class DriveTrain {
  public void processAction(Action action) {
    if (action.spec.equals("forwards")) {
      driveForwards(action.magnitude);
    }
  }
  
  public void driveForwards(int magnitude) {
    // ...
  }
}

Intake.java

public class Intake {
  public void processAction(Action action) {
    if (action.spec.equals("extend")) {
      extend();
    }
  }
  
  public void extend() {
    // ...
  }
}

Robot.java

public class Robot {
  DriveTrain driveTrain;
  Intake intake;
  public void initMethod() {
    driveTrain = new DriveTrain();
    intake = new Intake();
    
    // This is where the magic happens, it's as easy as this:
    AutoConfig ac = new AutoConfig("auto.json"); // pass it your json file
    ac.registerAction("drive", driveTrain);
    ac.registerAction("intake", intake);
  }
}