No delegateCommandHandler for vscode.java.resolveMainMethod

[M-k-03]

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.

[github-actions]

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

• Update the Language Support for Java™ by Red Hat extension to the latest version in the Extensions view, then reload VS Code.
  URL: https://marketplace.visualstudio.com/items?itemName=redhat.java
• Ensure Debugger for Java is installed and up-to-date.
  URL: https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-debug
• Run Java: Clean the Java Language Server Workspace from the Command Palette (Ctrl+Shift+P), then reload the window.
• Verify your JDK21 is correctly configured under java.configuration.runtimes or via java.home in settings.json.

Duplicate issue

• No delegateCommandHandler for vscode.java.resolveMainMethod #1308
  Same error: “No delegateCommandHandler for vscode.java.resolveMainMethod.”

Other references with low confidence

• Title: Version 1.41.1 breaks Test Runner for Java extension in VS Code
  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#4014

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!

[wenytang-ms]

Hi @M-k-03
please share your extension versions, thanks!

[montematheus50-boop]

ou mandar dps man

[github-actions]

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]

Try Java Platform Extension for Visual Studio Code #oracle.oracle-java