Cannot find main method for Maven project with subprojects #1006

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1. Jinbo Wang (testforstephen)

   added

   bug

   launch

   on Dec 1, 2021
2. Jinbo Wang (testforstephen)

   self-assigned this

   on Dec 1, 2021
3. ryno1234 commented on Jul 3, 2022

   

   Ryan Griffith (ryno1234)

   on Jul 3, 2022

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   Bump?
4. siebonguyen commented on Jul 26, 2022

   

   sibeo (siebonguyen)

   on Jul 26, 2022

   Last edited by siebonguyen

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   I am having same trouble with running a single java file in a maven sub-project. Don't event think that this issue takes too long time to solved or I have to back to super-weight eclipse IDE.
   Hope it will be solved soon.

   Updated:
   I found that the problem comes from jdk 11, which is the lowest version allowed by VS Code.
   Since my project requires jdk 8.
   I think there is no choice for me than bring the eclipse back.
5. github-actions commented on Nov 11, 2025

   

   github-actionsbot

   on Nov 11, 2025 – with GitHub Actions

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   Hi Marc Jakobi (@mrcjkb), I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

   Solution

   • Ensure you open the root folder of your multi-module Maven project (containing the parent pom.xml) as a workspace folder in VS Code, not just a single .java file. VS Code needs the full project structure to detect submodules and their main methods.
   • In the Java Projects or Maven explorer:
     • Click the Refresh button to re–import all modules.
     • Confirm that each subproject appears under Projects and that its src/main/java is marked as a source folder.
   • Once the modules are loaded, you should see Run | Debug codelenses above your public static void main(String[] args).
   • If it still doesn’t work:
     1. Run Java: Clean the Java language server workspace (F1 → type Java: Clean).
     2. Reload the window (F1 → Developer: Reload Window).
     3. Check the Java Language Server logs for errors (F1 → Java: Open All Log Files).

   Other references with high confidence

   • cannot find main method (cannot find main method #1207)
     • A generic troubleshooting thread where missing code lenses are often caused by workspace setup issues. Suggests opening a clean workspace and sharing logs if the problem persists. cannot find main method #1207 (comment)

   The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!
6. github-actions

   added

   ai-triaged

   on Nov 11, 2025
7. mrcjkb commented on Nov 11, 2025

   

   Marc Jakobi (mrcjkb)

   on Nov 11, 2025

   Author

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   I don't use vscode-java-debug anymore. Unsubscribing.
8. siebonguyen commented on Nov 11, 2025

   

   sibeo (siebonguyen)

   on Nov 11, 2025

   More actions

   I successfully using Java Debug on VS Code:

   

   What I have done:

   1. Install Extension Pack for Java
   2. Install Community Server Connector and tomcat 8.5.50
   3. set java home for Java Extension Pack and Community Server Connector in VS Code's settings.json:

   "java.jdt.ls.java.home": "d:\\Apps\\jdk\\x64\\jdk-18.0.2",							// java home for java extension pack
   "rsp-ui.rsp.java.home": "D:\\Apps\\jdk\\x64\\jdk-11.0.18"							// java home for Community Server Connector extension
   

   4. Reload VS Code