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addedToWorld not being called

By retrosnob, with 1 reply.
Replied to by danpost, over 9 years ago:

retrosnob wrote...

My actor's addedToWorld method isn't being called for some reason. Any ideas? < Code Omitted >

Please show your world class code (which is where I presume you have the Word object added into the world).

What rotation

By s08098, with 1 reply.
Replied to by danpost, over 9 years ago:

s08098 wrote...

How do I get the Rotation of my actor and use it in an 'If' Statement.

You get the rotation of the actor with the 'getRotation' method and you compare it to a value between 0 and 359 (or compare it two or three times to determine a range of values).

Show variable

By Bassieboy21, with 10 replies.
Last reply by danpost, over 9 years ago:

Okay, the following line in your space class: <Code Omitted>creates a local int variable named 'Score' that is assigned the current value of 'rocket.Score3', which is obviously zero since the object was just created and not added into the world yet. Obviously, since you already know its value, getting it in a local variable at that time really does not make any sense. It appears you put a 'Score' field in the space class as well. This is not the same variable as what that line assigns the 'Score3' rocket value to, either. In other words, you currently have three

How to make a timer?

By LakeOtis, with 4 replies.
Last reply by LakeOtis, over 9 years ago:

Reminders.

By Tyronmi, with 4 replies.
Last reply by Nosson1459, over 9 years ago:

Tyronmi wrote...

thanks Super_Hippo. i appreciate.

I got my point across. See here.

Your browser is ignoring the <APPLET> tag. Scenario not running?

By jhyoon92, with 4 replies.
Last reply by Nosson1459, over 9 years ago:

I also have Windows 10 and I only had to do two things to be able to see a scenario.

Add http://www.greenfoot.org/ to the Security panel in the Java control panel item by C:\Program Files (x86)\Java\jre1.8.0_111\bin\javacpl.cpl (on my computer, I didn't update Java yet so by you the folder might not have 1.8.0_111)
Run in Internet Explorer

For UserInfo to work you'll also have to do the things in this discussion (the AppData folder is usually a hidden folder).

Sound file playing too early... what do I do?

By PJaymz, with 3 replies.
Last reply by davmac, over 9 years ago:

Would creating the array within the if statement maybe work?

Your problem is that the sound is played when the world is constructed; specifically it is played in the play() method which is called from prepare() which is in turn called from the constructor (QuMaj()). If you create the array within the if statement then you just defer the issue to when the if statement runs. If each of your worlds plays a sound, then they will *all* play the sound at that time - include the QuMaj world, which will play its sound, even if it doesn't get selected. There are essentially two

mlk -> JoC #30

By aldrisang, with no replies.

Michael, I've run across another issue that keeps a game from compiling, and this happens with your breakout-v4.zip from Joy of Code #30 (Introduction to Loops). The line number is 23 is in Counter.java. Here is that line and the next one, constructing a font: <Code Omitted> It says cannot find symbol BOLD. I'm not sure what the second line is actually doing, so the fix I came up with to make it compile (with a bold font) is to use a constructor from the new Font class included with Greenfoot, like so: <Code Omitted> I'm sure there are other ways to do it; I know there are other constructors. If you are compiling a list of disclaimers to update JoC to work with the new Greenfoot "Color" and "Font" classes, I'll happily keep referring these to you. :) It might be easier to e-mail anything I find to you, but I don't have any contact info for that. Mine is aldrisang@gmail.com if you wish to contact me privately. Cheers!

Contact Michael Kolling?

By aldrisang, with 4 replies.
Last reply by mik, over 9 years ago:

I have added a comment to the YouTube version of the video (#20). I currently cannot edit the blog page (or enable comments) – long story, I have just moved jobs and don't have access to the blog anymore. The blog will hopefully move soon, and then I can add the comment.

How to make every Object in my World stop if the player hits something?

By ElAdriano, with 4 replies.
Last reply by ElAdriano, over 9 years ago:

Yeah it was unfinished because i couldnt autocomplete it with vMovement() But now it works perfectly. Thanks a lot :D

Bug Code skips turn(); Statement

By Peer202, with 1 reply.
Replied to by davmac, over 9 years ago:

You aren't repainting the world, and you aren't giving it a chance to repaint itself; the turn() is not being skipped, it's just that you can't see it taking effect. Don't use wait(1000); to delay (in fact, don't use it at all until you understand what it really does). It's not meant for that, and as you've written it won't work. Use Greenfoot.delay(1); instead, and as an added bonus the world will get repainted; or, if you must, use Thread.sleep(1000); (the world won't get repainted automatically). Use the world's "repaint()" method if you need to force a repaint. F

Shift-Clicking Problem?

By aldrisang, with 2 replies.
Last reply by aldrisang, over 9 years ago:

I'm not sure what happened, but it does work now. I'm up to JoC #20, where it's still being taught to use java.awt.Color, which actually doesn't work anymore, but I figured that one out with Google. :) Just wish I could let Michael Kolling know his videos need a disclaimer, lol. EDIT: Turns out Michael Kolling actually reads this forum, and he'll do what he can to update his blog and/or videos. Yay.

Change the image of an actor by clicking

By ezuxr, with 7 replies.
Last reply by ezuxr, over 9 years ago:

@danpost: It works really well! thank you for helping!

Some small issues with Greenfoot.org

By Nosson1459, with 14 replies.
Last reply by Nosson1459, over 9 years ago:

Thanks. (I had to find a place that I posted last to see it before I wrote this post)

Lives counter

By dillyduck, with 11 replies.
Last reply by Nosson1459, over 9 years ago:

I didn't say it could be anything else but the question was "Any idea on how to fix?" meaning the problem so I thought that by him "it" means the error/problem so he has to edit that method not just edit it.

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