This site requires JavaScript, please enable it in your browser!

Discussions

You need to login to take part

Current Discussions

Fire class appears before BlueCar reaches X axis

By suzbo, with 4 replies.
Last reply by danpost, 40 minutes ago:

Fire class appears before the BlueCar reaches the location of the X axis

With what you have given, I cannot see any reason for what you say is happening. The only strange thing I see (which I cannot expect to be related to your issue) is the exclamation mark inside the filename of the image -- and that may be fine, as is.

I need help with a level select screen

By kahn, with 3 replies.
Last reply by danpost, about 4 hours ago:

this is supposed to remove both of the start options but it does not

Not enough info. How and where is start2 defined and assigned its value?

Bow Shooting

By insurqassable, with 1 reply.
Replied to by danpost, about 5 hours ago:

Remove the counter and add a boolean to track the state of the "space" key. Check for a change in the state of the key by comparing current state to previous state (held by field). When a change is detected, update the field and check its new value to determine when to shoot.

exporting scenarios

By TakedaYeet, with no replies.

I finally finished a very simple game where a spider attempts to eat ants. I wanted to save it as an .exe file and found out that you had to save as a .jar file, and compile it into a .exe file.when I export it, it saves as a win.rar file and I can't find the .jar file or anything similar. the only thing I could find is png files, text files, and things of that nature. if there is a way to export it please tell me. thanks in advance.

Exercise 10.48.

By dROS, with 1 reply.
Replied to by danpost, about 17 hours ago:

How do i ... Add two buttons to change voume up and down

Do your MusicUp and MusicDown buttons have their images, yet? If so, give the buttons something to do.

Problem with press key

By Paciman, with 4 replies.
Last reply by danpost, about 24 hours ago:

Paciman wrote...

Could you maybe explain just the code you just wrote down. I would really appreciate i dont like writing things I don't understand

The first line was moved outside the method so the values can be retained (not reset every time the method is called). The second line was added to track the (last known) state of the "space" key. Line 6 checks to see if the state of the key had changed (either just pressed or just released). Line 8 updates the tracking field when a change in the state of the key is detected. Line 9 reverses gravity if the new state is the down state (ju

actor losing lives not working

By MsWoof, with 1 reply.
Replied to by danpost, about 24 hours ago:

You can execute the last two methods given above in your World subclass from the Mario class just like you call the previous method from the Mario class.

setImage doesn't work in World subclass

By BkS, with 2 replies.
Last reply by danpost, 1 day ago:

Actors use setImage and worlds use setBackground. However, I doubt you want this particular image to be tiled on your world's background. You probably should create an actor, give it this image to use and add it into the world. Another option is to use setText on the world; however, then you will not be able to control color, font and size.

World not instantiating

By genju, with 3 replies.
Last reply by genju, 1 day ago:

the problem is fixed now, i did the commenting thing but that wasnt what fixed everything.. for some reason i just needed to right click the class in the main screen and click new StartWorld(). not sure why that happened but atleast now i know what to do in case it happens again, thanks for the quick response dan

How can i push an object?

By svenfrijters, with 3 replies.
Last reply by danpost, 1 day ago:

In what class is the code given placed into? Line 3 looks like it takes an object of one type and places it in a field that holds a different type.

greenfoot导出的jar文件

By 旧城梦, with no replies.

错误: 找不到或无法加载主类 greenfoot.export.GreenfootScenarioApplication 原因: java.lang.NoClassDefFoundError: javafx/application/Application 请问这个问题，有人可以帮助一下吗？

greenfoot导出程序jar怎样运行？

By 旧城梦, with no replies.

在Windows 10，怎样将jar文件打开

How to I make "Gravity"?

By pio22mibi, with 2 replies.
Last reply by Gamingprotramp7, 2 days ago:

Gamingprotramp7 wrote...

private final int GRAVITY = 1; //gravity. to make it fall. Final int so it cant be changed unless you hard code it. private int velocity; //optional. makes it fall faster over time. makes it more realistic. public void fall() //fall. method for gravity to work { setLocation(getX(), getY() + velocity); //makes character fall depending on velocity if (isOnSolidGround()) //checks if boolean isOnSolidGround() is true { velocity = 0; //sets velocity to 0 if its on solid ground so the character doesnt fall through objects

Trouble with background

By Al3x7373, with 36 replies.
Last reply by danpost, 2 days ago:

Remove those two lines you just added. Below in 'public Sky()', modify these lines: <Code Omitted>

Is there a way to press a button and have the program quit completely?

By TylerBlair, with 1 reply.
Replied to by danpost, 3 days ago:

TylerBlair wrote...

I was wondering if there was a way that a user can press a key and then have the program quit. I know how the keypress works but I am just looking for what would come after that.

I think you want: <Code Omitted>

1

X