Skip to content

Force javac instead of eclipse jdt as compiler #3007

Closed
Closed
Force javac instead of eclipse jdt as compiler#3007
Labels
annotation-processingbug

Description

@dawosch
dawosch
opened on Mar 19, 2023

Hey, i'm using visual studio code with the "extension pack for java" extension.
Local i have installed java 17 (microsoft edition).
When i build my project with mvn -U clean install there will be classes generated and everything is fine.
But when i press shift + alt + B like your readme says, the code will be compiled with the eclipse jdt compiler, which seems to have problems with a dependecy called MapStruct.

Here is one file compiled with maven:
image

And here is the same file after pressing shift + alt + B:
image

Have a look at line 20.
When i start my project the java extension always recompile my code (with the eclipse compiler).
I disabled the auto build feature, but that changed nothing.
I also configured the runtimes for java 17 in hope that this version will be used for compiling my code, but it doesn't.

Here is a repository i created to reproduce the error: Repository

Here are also some settings of vscode:

{
  "java.configuration.updateBuildConfiguration": "automatic",
  "java.debug.settings.onBuildFailureProceed": true,
  "java.autobuild.enabled": false,
  "java.debug.settings.forceBuildBeforeLaunch": false,
  "java.jdt.ls.java.home": "C:\\Program Files\\Microsoft\\jdk-17.0.5.8-hotspot",
  "spring-boot.ls.java.home": "C:\\Program Files\\Microsoft\\jdk-17.0.5.8-hotspot",
  "java.compile.nullAnalysis.mode": "disabled",
  "java.configuration.runtimes": [
    {
      "name": "JavaSE-17",
      "path": "C:\\Program Files\\Microsoft\\jdk-17.0.5.8-hotspot",
      "default": true
    }
  ]
}
Environment
  • Operating System: Windows 10
  • JDK version: 17 (microsoft edition)
  • Visual Studio Code version: 1.76.2 (user setup)
  • Java extension version: 1.16.0
Steps To Reproduce
  1. Clone my test repository
  2. Run mvn -U clean install in the terminal
  3. Have a look at the generated source file TestMapperInterfaceImpl.java on line 20 (the setter)
  4. Press shift + alt + B to compile the project
  5. Have a look at the same file and you will notice that the setter is gone

Test repository: Link to the repository

Current Result

The eclipse jdt compiler messed something up so the generated files are not working.

Expected Result

The compiler i defined in the runtime settings should be used to compile my code.

Additional Informations

I also opened a issue at the microsoft/vscode-spring-dashboard extension because i first thought that the error is a problem ob this extension because i started my project over this extension. But i noticed that before it starts it will be recompiled.
Link to the issue of the spring boot extension

Activity

  1. snjeza commented on Mar 20, 2023

    @snjeza
    snjeza
    on Mar 20, 2023
    Collaborator

    The issue is not related to eclipse jdt compiler.

    @dawosch Could you try the following:

    • move the mapstruct-accessing-strategy module to a separate project
    • remove the mapstruct-accessing-strategy module from the com.example:parent project
    • install mapstruct-accessing-strategy
    $ mvn clean install
    • open com.example:parent in VS Code or Eclipse
      TestMapperInterfaceImpl.java
    package com.example.demo;

import javax.annotation.processing.Generated;

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2023-03-20T01:40:43+0100",
    comments = "version: 1.5.3.Final, compiler: Eclipse JDT (IDE) 3.33.0.v20230218-1114, environment: Java 17.0.6 (Eclipse Adoptium)"
)
public class TestMapperInterfaceImpl implements TestMapperInterface {

    @Override
    public TestOutput toTestOutput(TestInput testInput) {
        if ( testInput == null ) {
            return null;
        }

        TestOutput testOutput = new TestOutput();

        testOutput.setValue( testInput.value() );

        return testOutput;
    }
}

    See https://github.com/dawosch/vscode-java-extension-compiler-error/blob/main/app/pom.xml#L54

  2. jdneo
    added
    bug
    annotation-processing
    on Mar 21, 2023

  3. dawosch commented on Mar 21, 2023

    @dawosch
    dawosch
    on Mar 21, 2023
    Author

    Thanks for your answere.
    Yes this seems to work fine.

    But i'm wondering why the language server needs to recompile all files.
    When i have java installed and all settings point to my java version, i would expect that the language server will use this java version to.

  4. snjeza commented on Mar 22, 2023

    @snjeza
    snjeza
    on Mar 22, 2023
    Collaborator

    The issue is related to the Java Service Provider. The provider configuration have to be packed into a jar file.
    See https://docs.oracle.com/javase/tutorial/ext/basics/spi.html#package-in-jar-files

    Note that the provider configuration file must be in the directory META-INF/services in the JAR file.

  5. rgrunber commented on Jul 16, 2025

    @rgrunber
    rgrunber
    on Jul 16, 2025
    Member

    Closing this as it seems to have a solution. Also FWIW, we support javac-based compilation as well now : https://github.com/redhat-developer/vscode-java/wiki/Javac%E2%80%90based-compilation-support .

  6. rgrunber
    closed this as completedon Jul 16, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    annotation-processingbug

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions