I assume that you have already downloaded the JSON library. If not, you can download it from here: Maven repo
Go to File -> Project Structure...
Then click on the Library tab on the left-hand side. You can add or remove any libraries. 
I assume that you have already downloaded the JSON library. If not, you can download it from here: Maven repo
Go to File -> Project Structure...
Then click on the Library tab on the left-hand side. You can add or remove any libraries. 
if you tried all the download links for the Json.jar and its probably not working you can check this link out
after the link loads, search in the table where you can find "file" at the right of it you will see different kinds of file types. Select jar and wait for it to download.
you can now add the downloaded json.jar file in your Intelij.
open your intelij IDE press CTRL + ALT + SHIFT + S
just by the left of the dialog select modules then from the tabs choose dependencies then hit the + choose JARs or Directories, a dialog is gonna pop up prompting you to select the file path or directory where you have your json.jar. in most cases the json.jar is located in the downloads folder for PC users since it was downloaded. So, select the directory that have your json.jar file, find the json.jar in the directory. Then, hit enter and apply then wait for it to sync.
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I would just like my project to have no external dependencies, and am finding Maven very frustrating to use. Edit: JavaFX

Steps for adding external jars in IntelliJ IDEA:
- Click File from the toolbar
- Select Project Structure option (CTRL + SHIFT + ALT + S on Windows/Linux, โ + ; on Mac OS X)
- Select Modules at the left panel
- Select Dependencies tab
- Select + icon
- Select 1 JARs or directories option
IntelliJ IDEA 15 & 2016
File > Project Structure...

or press Ctrl + Alt + Shift + S
Project Settings > Modules > Dependencies > "+" sign > JARs or directories...

Select the jar file and click on OK, then click on another OK button to confirm


You can view the jar file in the "External Libraries" folder


