Discussions

Would it be possible from someone to show the completed version, so you can see it actually running in Greenfoot?

Do you have a reverseY() method in your Orb class? (also, when you get a compiler error, please tell us on which line of your code the problem is! Thanks). Also, your code seems to have been copied wrongly. You would get plenty of other errors first if you tried to compile the exact code you posted! You have a couple of an extra '}' symbol. Make sure you copy and paste the exact code!

THanks everyone! I'll check those resources out n see what I can understand. I appreciate the replies!

Read this tutorial, if you haven't already. It may be of some benefit to go through the other tutorials too. Once you've done that much, if you still don't understand, post some specific questions here.

You should be able to use the same code (basically). You just need an integer instance variable to control the general direction (1 for left to right (increasing x), and -1 for right to left (decreasing x)). If your robot faces left or right, you can reverse the image (mirrorVertically()) to show it facing the other way.

I already figured it out, but thanx anyway, couldn't have done it without you

Thanks :D! I got it all finished up here

Ahaha, thanks, I forgot I needed to create a new one since there wasn't one there yet. If it doesn't work as a world I'll make it an actor. Thanks :D.

Have a look at the methods in the API documentation for the Actor class, and see which ones might be useful. Have a go at trying to use them. If you run into problems or have specific questions, post here.

Huzzah! I just had the "non-static method" problem for another scenario, but was able to fix it on my own! I'm making lots of progress, thanks again guys :D.

I think that == seems to work sometimes because Java handles strings a little differently than most objects, it has something called a "String Literal Pool" where it has all the strings that are coded into your program already sitting there in memory, or something like that, and it is optimized to use as few strings as possible, so if you have literal strings in your code, and you reference them, a lot of the time you will be referencing the same string anyway and == works. But other times it won't work. Just remeber the difference between references, primitives, and objects. == compares refer

Thanks! And I would say that doing "if (someVariable != null)" could help with many methods that can return null?

Thank you so much for the explanations!!!!! they helped me understand and figure it out!!! Thanks again AwesomeNameGuy and DanPost!! I really appreciate your help!