public void undo() { if (prevStatus == DVDPlayer.Pull) { DVDplayer.Pull(); } else if (prevStatus == DVDPlayer.Play) { DVDplayer.Play(); } else if (prevStatus == DVDPlayer.Off) { DVDplayer.Off(); } else if (prevStatus == DVDPlayer.On) { DVDplayer.On(); } else if (prevStatus == DVDPlayer.Stop) { DVDplayer.Stop(); } }
public void execute() { prevStatus = DVDplayer.getStatus(); DVDplayer.Off(); }