CODEWITHSUNDEEP
javaintellij-ideasettings
Warda
Warda

Reputation: 1295

Error: Module not specified (IntelliJ IDEA)

I was trying to execute a simple program in IntelliJ IDEA as a static web project. I'm newbie and I'm learning web development with Node.js. I took help from the official website of IntelliJ IDEA, but the error was same. Though, I configured the settings and Project structure also.

Error:

"C:\Program Files\Java\jdk1.8.0_91\bin\java" -Didea.launcher.port=7535 "-Didea.launcher.bin.path=C:\Program Files\JetBrains\IntelliJ IDEA 2016.1.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2016.1.2\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain ""
Exception in thread "main" java.lang.ClassNotFoundException: 
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:122)

Process finished with exit code 1

Snapshot of IDE

Please help me to sort out this problem. I'm digging out this problem since few days.

Upvotes: 94

Views: 182671

Answers (7)

Svyatoslav Shabanov
Svyatoslav Shabanov

Reputation: 11

for anyone struggling with the same problem on idea 2023 ultimate after spending hours trying to resolve this issue, one thing that worked for me:

  • close project
  • delete the project from the recent list
  • delete the .idea folder in the root of the project
  • open the project again

Upvotes: 1

Ravi
Ravi

Reputation: 11

I faced the exact issue of module not found and solved it by navigating to pom.xml file in file system of my project and opening it as a maven project in my intelliJIdea.

Then it has populated the sub modules for selection in the edit configurations window.

Upvotes: 1

Hanz
Hanz

Reputation: 264

this is how I fix this issue
1.open my project structure

2.click module enter image description here 3.click plus button enter image description here 4.click import module，and find the module's pom enter image description here
5.make sure you select the module you want to import,then next next finish:) enter image description here

Upvotes: 23

tonderaimuchada
tonderaimuchada

Reputation: 233

For IntelliJ IDEA 2019.3.4 (Ultimate Edition), the following worked for me:

  1. Find the Environment variables for your project.
  2. Specify, from the dropdowns, the values of "Use class path of module:" and "JRE" as in the attached screenshot.

enter image description here

Upvotes: 2

Onat Korucu
Onat Korucu

Reputation: 1032

This happened to me when I started to work with a colleque's project.

He was using jdk 12.0.2 .

If you are suspicious jdk difference might be the case (Your IDE complains about SDK, JDK etc.):

  1. Download the appropriate jdk
  2. Move new jdk to the folder of your choice. (I use C:\Program Files\Java)
  3. On Intellij, click to the dropdown on top middle bar. Click Edit Configurations. Change jdk.
  4. File -> Invalidate Caches and Restart.

Upvotes: 1

Gomez NL
Gomez NL

Reputation: 942

Faced the same issue. To solve it,

Upvotes: 0

Elham Kohestani
Elham Kohestani

Reputation: 3162

This is because the className value which you are passing as argument for
forName(String className) method is not found or doesn't exists, or you a re passing the wrong value as the class name. Here is also a link which could help you.

1. https://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html
2. https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#forName(java.lang.String)

Update

Module not specified

According to the snapshot you have provided this problem is because you have not determined the app module of your project, so I suggest you to choose the app module from configuration. For example:

enter image description here

Upvotes: 127

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