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No delegateCommandHandler for vscode.java.resolveMainMethod #1612
Description
After installing the Java extensions in VS Code, the Run/Debug option does not work and the following error appears:
No delegateCommandHandler for vscode.java.resolveMainMethod
Additionally, VS Code shows:
The version of required extension "Language Support for Java™ by Red Hat" is too stale. Please update it and reload the page.
The Java Language Server does not start, and the main() method is not detected.
Environment
- VS Code: (add your version)
- JDK: Microsoft OpenJDK 21 (C:\Program Files\Microsoft\jdk-21.0.10.7-hotspot)
- OS: Windows
- Extensions: Extension Pack for Java
Steps Already Tried
- Updated and reinstalled Java extensions
- Deleted .vscode, extensions, extensionsCache, and extensionsObsolete
- Restarted VS Code and system
- Manually configured java.configuration.runtimes
Issue still persists.
Activity
github-actions commentedon Feb 24, 2026
Hi M-k-03, 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
URL: https://marketplace.visualstudio.com/items?itemName=redhat.java
URL: https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-debug
java.configuration.runtimesor viajava.homein settings.json.Duplicate issue
Same error: “No delegateCommandHandler for vscode.java.resolveMainMethod.”
Other references with low confidence
Description: After updating, users see
No delegateCommandHandler for vscode.java.test.get.testpath. Points to an extension-version mismatch. URL: Version 1.41.1 breaks Test Runner for Java extension in VS COde redhat-developer/vscode-java#4014The 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!
wenytang-ms commentedon Mar 23, 2026
Hi M-k-03
please share your extension versions, thanks!
montematheus50-boop commentedon Apr 6, 2026
ou mandar dps man
github-actions commentedon Apr 14, 2026
This issue has been closed automatically because it needs more information and has not had recent activity. Please reach out if you have or find the answers we need so that we can investigate further.
LaoDog commentedon Apr 18, 2026
Try Java Platform Extension for Visual Studio Code #oracle.oracle-java