[LWJGL] How to properly load images and use them in a JAR(SOLVED)

Newbie & Debugging Questions
#1

Figured it out :smiley:

#2

What does cmd exactly say?

#3

It tells me:

java.io.FileNotFoundException: res\FlubberFlap.png (The system cannot find the p
ath specified)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:131)
        at FSMain.MainFS.main(MainFS.java:68)

In line 68 I use:

wood = TextureLoader.getTexture("PNG", new FileInputStream(
					new File("res/Baddy.png")));

Someone said not to use a new file, but im not sure exactly what to do. If you can look at my source, my main class is MainFS.

#4

Remember, if it’s in a Jar it’s not typically accessible through the strema. You have to do somethin’ extra to get it. Try (And replace THISCLASS with the class making use of that command):


TextureLoader.getTexture("PNG", THISCLASS.getClass().getResourceAsStream(new File("res/Baddy.png"));
#5

That’s also another problem, I get this error in that syntax:

Cannot make a static reference to the non-static method getClass() from the type Object

.
Maybe because I run everything in my main method. The main class doesn’t have a constructor.

#6

Well then reference the class itself.


TextureLoader.getTexture("PNG", ThisClass.class.getResourceAsStream(new File("res/Baddy.png"));
#7

I tried

ef = new File("res/Baddy.png");

wood = TextureLoader.getTexture("PNG", MainFS.class.getResourceAsStream(ef.getPath()));code] and got the exception :

Exception in thread “main” java.lang.NullPointerException
at org.newdawn.slick.opengl.TextureLoader.getTexture(TextureLoader.java:64)
at org.newdawn.slick.opengl.TextureLoader.getTexture(TextureLoader.java:24)
at FSMain.MainFS.main(MainFS.java:75)




I also tried

TextureLoader.getTexture(“PNG”, ThisClass.class.getResourceAsStream(new File(“res/Baddy.png”)));



and got the exception:

The method getResourceAsStream(String) in the type Class is not applicable for the arguments (File)

  :emo:
#8

Er, remove the “new File” part. That was my mistake!


TextureLoader.getTexture("PNG", ThisClass.class.getResourceAsStream("res/Baddy.png"));
#9 
			wood = TextureLoader.getTexture("PNG", MainFS.class.getResourceAsStream("res/Baddy.png"));

gives the exception :

Exception in thread "main" java.lang.NullPointerException
	at org.newdawn.slick.opengl.TextureLoader.getTexture(TextureLoader.java:64)
	at org.newdawn.slick.opengl.TextureLoader.getTexture(TextureLoader.java:24)
	at FSMain.MainFS.main(MainFS.java:75)
#10

Only other thing I can think of is that the file isn’t being loaded correctly some way.

Try: The getResouceAsStream and then print out its type. It might be that you’re not getting anything because the file isn’t showing up in the .jar.

#11

Aren’t you forgetting the “/” in front of res?

#12

My res/ is a resource folder that’d not under the src/.


Ignore the error in Begginer. Is this right? I have a video loading of what I did. Ill post it in a second

#13

Here is the video of what I did: http://www.mediafire.com/watch/vjsnf1b1xoy6kdz/texturesssss.mp4

#14

Wouldn’t that cause problems on Unix-like systems where a path starting with / is treated as absolute?

#15

From the docs: http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#getResourceAsStream(java.lang.String)

[quote]If the name begins with a ‘/’ (’\u002f’), then the absolute name of the resource is the portion of the name following the ‘/’.
Otherwise, the absolute name is of the following form:
modified_package_name/name
Where the modified_package_name is the package name of this object with ‘/’ substituted for ‘.’ (’\u002e’).
[/quote]

#16

Here are some Image Utilities I use all the time: http://pastebin.com/JBQ8B8Y0

To load a image call:


wood = ImageUtils.loadBufferedImage("res/Baddy.png");

This will work for all Systems, for eg, Windows, Linux, Mac.

#17

You don’t always need to use the class like this:


MainClass.class.getResourceAsStream("res/resource.png");

You could just do this:


"res/resource.png"

And then put a res folder in the same folder with the jar. This is a really cool thing to do when you want your players to be able to edit your textures like texture packs in Minecraft. I believe thats how Notch did that anyways.

#18

Given the topic title, I’m assuming that OP wants the resources in the jar.
Also, doing so doesn’t stop anyone who wants to from modifying resources.

#19

I specifically said:

[quote]This is a really cool thing to do when you want your players to be able to edit your textures like texture packs in Minecraft.
[/quote]
So yes, I know that people can edit it. And thats kinda what you wanted them to do. Well, if you wanted texture-packs anyways.

#20

Wouldn’t I need to put it in a zip? I want them to just download the game and run it without any other files.

What is OP?