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Standalone JAR generation

By sgparry, with 2 replies.
Last reply by sgparry, 5 months ago:

Thanks for that; looking at the problem more holistically, have you considered using jlink to generate a complete self-contained application runtime? Be warned, this is not for the fainthearted - the compiled project has to be fully modular, including all dependencies, which can be a real pain (although there are plugins you can use to coerce non-modular libraries to become modular).

Can't change color of a brick

By Dmi243m23, with 1 reply.
Replied to by danpost, 5 months ago:

Dmi243m23 wrote...

I set color of a brick in its constructor, but the color doesn't change at all. Can someone please help me? << Code Omitted >>

Try setting the drawing color BEFORE filling the rectangle in (switch lines 4 and 5 in your Brick class constructor).

How to move onto next level without creating an infinite next level loop

By classKniv, with 4 replies.
Last reply by danpost, 5 months ago:

classKniv wrote...

Erroring code seems to be from LN 120-143

Lines 121 to 126 can be simplified to the following: <Code Omitted>

Scenario stopping on its own without error when testing

By Suhayo, with no replies.

Hi, I"m doing a project on making a racing game. Earlier I wrote a method that's supposed to give an output the instant a key is either pressed down or released, and when I tried running it, the program would run for half a second or so and then just end without any error message in the console. I asked for some help in a discord server and then started some more modifications where I switched from scalar to vector values for everything, and now even with the KeyPressed method not running, I am having the same issue so I can not test any of the changes I just made as it just stops right after i click the run button. Any help is greatly appreciated. here's the class: https://pastebin.com/0nqMGu7k There's also a Vector2D class with basic functions and a MyWorld class that creates the world and player object

Scoring Table

By YagoJose17, with 2 replies.
Last reply by YagoJose17, 5 months ago:

Thank you for your attention, but I have changed the project plans.

any plans to switch to Blockly instead of Stride?

By won0c, with no replies.

Are there any plans to switch to Blockly instead of Stride? I find Stride to be very inefficient. I think it's better to learn the Java language the right way. As an educational platform, I would like to request a switch to Blockly from Stride as soon as possible to make novice students learn programming languages easier.

Removing / Erasing pixels from a Transparent background

By MrBradley, with 1 reply.
Replied to by danpost, 5 months ago:

MrBradley wrote...

It seems that I need to use GreenfootImage#setColorAt(...) with a transparent Color(0,0,0,0) in order to remove / erase pixels, instead of GreenfootImage#drawRect(...) after setting the image color to transparent. This surprised me and seems counter intuitive. Can someone offer an explanation, please? Thanks in advance. << Details Omitted >>

Drawing is like painting. Using clear paint, you cannot remove or hide any color that might already be there. That is, opaque colors remain as is. I would suggest that you use the clear

How to slow down timer

By Divyanshi, with 2 replies.
Last reply by Divyanshi, 5 months ago:

How to spawn actor somewhere else.

By raaeeth, with 1 reply.
Replied to by danpost, 6 months ago:

raaeeth wrote...

After my actor hit another actor, it ends the game (thats what I want). Now what I would like to happen is that after I click the reset button, my actor teleports back to the original spawn. I have the button and everything to reset, except the code for the actor to make him go back as well. How can I make an actor teleport with the push of a button?

You should be able to just start a new world (which should be equivalent to a reset). Something like this: <Code Omitted>(where btnReset is

Error on Greenfoot Web

By adameins, with 2 replies.
Last reply by adameins, 6 months ago:

Exception instantiating world class: java.lang.RuntimeException - (JavaScript) Error: Invalid recorded state

score counter dosnt work

By JesseJW09, with 4 replies.
Last reply by JesseJW09, 6 months ago:

It didn't work but its ok because I've found a different method for the score counter. Thanks for the help though!

Text gains double spacing when uploaded to website

By Owlias, with 3 replies.
Last reply by danpost, 6 months ago:

Owlias wrote...

one of my sprites (Goblin) doesn't get imported from the files and assigned directly to the actor. I've checked multiple times and it appears to be in there on my version (locally). Any suggestion on getting this image to be assigned? (image is naturally assigned to the actor within Greenfoot app)

You can just set the image in the constructor of the class. For example: <Code Omitted>

Image is only scaling once but never again

By toemilio, with 1 reply.
Replied to by danpost, 7 months ago:

toemilio wrote...

So I'm making a flappy bird project for my computer science class and one of our extensions is to create a powerup that makes you smaller. My problem is that the code will run perfectly once, it scales my image and makes it smaller, but every other time I run it the image stays the same. Every solution I try it will work once but never again. << Code Omitted >>

If line 3 is to be the beginning of the constructor of the class, then the keyword void should be omitted from the line.

I have a problem with my code

By Nordrasil, with 5 replies.
Last reply by Nordrasil, 7 months ago:

You're right. It's working now. Thanks so much for everything.

I want to reset the world using this code, butonly after like 7 seven seconds and not immediately

By LOSERrr, with 1 reply.
Replied to by danpost, 7 months ago:

LOSERrr wrote...

Try putting the following line along with the given line: <Code Omitted>

4

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