Error Module not specified IntelliJ IDEA

Question

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

User · Answer

this is how I fix this issue 1 open my project structure 2 click module  3 click plus button  4 click import module and find the module s pom  5 make sure you select the module you want to import then next next finish

User · Answer

Faced the same issue  To solve it     I had to download and install the latest version of gradle using the comand line    sdk install gradle using the package manager or   brew install gradle for mac  You might need to first install brew if not yet   Then I cleaned the project and restarted android studio and it worked

User · Answer

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

User · Answer

For IntelliJ IDEA 2019 3 4  Ultimate Edition   the following worked for me    Find the Environment variables for your project  Specify  from the dropdowns  the values of  Use class path of module   and  JRE  as in the attached screenshot

User · Answer

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      Download the appropriate jdk Move new jdk to the folder of your choice   I use C  Program Files Java  On Intellij  click to the dropdown on top middle bar  Click Edit Configurations  Change jdk  File -  Invalidate Caches and Restart

[java] Error: Module not specified (IntelliJ IDEA)

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