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getResourceAsStream() method not working for json file

I a trying to create a .jar file of my JavaFX project in eclipse. I have moved all resources (images and a JSON file) into the res folder and configured it as a source folder. I used
Image iFloorPlan = new Image(this.getClass().getResourceAsStream("/Floor-Plan.jpg"));
for my Image, and it works perfectly, but when I try to do File f = new File(this.getClass().getResourceAsStream("Murder-on-the-2nd-Floor-Raw-Data.json"));
, eclipse underlines it and says 'The constructor File(InputStream) is undefined'

How to export working jar with non-jar dependencies

im fairly new to java and im making a pokemon style game for practice and i would like to be able to send the game to my friends.
here is the main problem: the game works fine in my netbeans IDE, but using the jar file in my dist folder does not work and throws a nullPointerException. i have narrowed down the problem. my game uses imageIcons and png/gif images that i have imported in my libraries. im getting access to them like this
Icon bckground = new javax.swing.ImageIcon(getClass().getResource("/pictures/BG.gif"));
i am unsure how to get the images into the lib folder for the program to find. i have tried copying the files straight into the lib folder and creating a folder for them called pictures; neither worked. right now the lib folder contains only a single jar from one of my other libraries. (that is the only jar file that i am importing to my libraries)
Pic of what it looks like in IDE

In my case, i did something like this.
final BufferedImage image = ImageIO.read(new File("something.jpg"));
I just transferred something.jpg into the dist folder, and it worked fine.
After clean-building your project, put the BG.gif into the dist folder, then run your jar file in dist folder. Now everything should be fine. When sending your game to your friends, you can encapsulte (hide, set read-only) your code (google encapsultaion java), then with the BG.gif being transferred into dist folder, archive the project. Then your friends only need to unzip it and find jar file in dist folder.
Hope this will help:)

Please put your picture (BG.gif) in the package (directory) where it is used as icon Icon bckground = new javax.swing.ImageIcon(getClass().getResource("BG.gif")); inside the jar file. You need to change the path of the file first getResource("BG.gif") and then create the jar file from IDE. If the jar does not contain the image, you can open the jar using using any unzip application (winrar etc.) and copy and paste the the image file in the directory where the class is present. Please let me know the outcome.

Navigating a folder up?

I am wondering how I can navigate a folder up like shown here: https://github.com/libgdx/libgdx/wiki/Texture-packer#automatic-packing
I did exactly the same ../ but libgdx is registering .. as a folder and does not go up in the tree. However the docs are kinda old and might be outdated.
TexturePacker.Settings settings = new TexturePacker.Settings();
settings.maxWidth = 1024;
settings.maxHeight = 1024;
TexturePacker.process(settings, "../images",
"../android/assets/tilesets/",
"set01");
//Input file does not exist: C:\Programming\Java\LibGDX\Projects\CloneQuest\android\assets\..\images
The reason why I want this is because I want to have a image folder with all separate images outside the assets folder. Whenever the desktop application is run in it's current state it will pack the images into the assets folder. But these separate images won't be transferred to the jar or apk when making a build.

This is working, the output just prints it like this. Are you sure there is a folder images as a sibling of assets, as you can see you are in the assets folder
C:\Programming\Java\LibGDX\Projects\CloneQuest\android\assets..
Please provide your folder structure if you struggle.

images not showing up when running JAR

I've spend 5 hours already and have no idea why images are not loaded when running Jar.
Project structure:
Blackjack_Game
- Source Packages
- Images
- blackjack
.... classes...
At project properties I have src - Source Packages folder added by default. Tried to put images directly into the project's folder and removing /Images/, but still no help.
Inside the code I have:
dealer_url = getClass().getResource("/Images/4_of_hearts.jpg");
File img = new File(dealerCardGenerator.dealer_url.getPath());
BufferedImage bufferedImage = ImageIO.read(img);
dealerCardGenerator.imageIcon = new ImageIcon(bufferedImage);
So inside NetBeans IDE everything is OK. Fully working. But after built&clean I see no images, but all actions are done.
Can you please suggest what is wrong? Getting so mad because of this ((((

A jar entry is not a file. java.io.File can only identify a file, not a jar entry. java.net.URL however can identify a jar entry using the jar: scheme, or a file using the file: scheme. That's why Class.getResource() returns a URL not a File.
Two solutions:
use the URL: ImageIO.read(getClass().getResource("whatever"))
ImageIO can also use an already-opened stream, which classloader can provide:
ImageIO.read(getClass().getResourceAsStream("whatever"))
Duplicate of at least #2-4 of the questions autosuggested as related:
Including Images with an executable jar
Loading images in a jar
Getting images from a .jar file

Thank you all for clarifying the problem. I've realized why some functions were not working.
So the solution is to replace URL with ImageIcon:
ImageIcon i2 = new javax.swing.ImageIcon(getClass().getResource("whatever"));
and then just set icon as label icon:
jLabel1.setIcon(i2);
In this way JAR works. Previously, all methods after this icon set operation were not working, as the program was actually stopped, now everything works fine.

Java won't export my resources properly

So I have 2 class folders one is res the other is lib. My res folder has two other sub folders one with images the other with sounds. My lib folder has 4 other jar files and a native folder. It all works within eclipse but when I try to export it as a runnable jar it does not work. I won't won't recognize anything.
I am to call my images I am using ImageIO.read(new File(imagePath)); For the sound I am using the external libraries I mentioned earlier to load and play them.

I am to call my images I am using ImageIO.read(new File(imagePath))
Contrary to your title, this is not an Eclipse problem - it's simply a bug in your code, because your code assumes that the image is stored as a file in the file system, when it's not.
You don't have a file for the image, so you shouldn't use new File. You should instead use Class.getResource or ClassLoader.getResource - or the getResourceAsStream equivalents. That way, it will load the resource from whatever context the class itself is loaded, which is appropriate for jar files. So for example, you might have:
Image image = ImageIO.read(MyClass.getResource("foo.png"));
... where foo.png is effectively in the same package structure as the class. Alternatively:
Image image = ImageIO.read(MyClass.getResource("/images/foo/bar.png"));
where images is a folder within the root directory of one of your jar files loaded by the same ClassLoader. (We don't have enough information to give you complete code here, but that should be enough to get you going.)