public class DroneStatus
{
    public static final int STATIONARY = 0;
    public static final int BEING_PULLED = 1;
    
    private DroneStatus ()
    {
    }
}
public class DroneStatus
{
    public static final String STATIONARY = "0";
    public static final String BEING_PULLED = "1";

    private DroneStatus ()
    {
    }
}
Update DroneStatus.java