How to specify Java version in VS Code?

Question

I have created a virtual machine to run some java code in it and have specified the VM to run with java 11

ubuntu@go-v12as34df:~$ java -version
openjdk version "11.0.21" 2023-10-17
OpenJDK Runtime Environment (build 11.0.21+9-post-Ubuntu-0ubuntu122.04)
OpenJDK 64-Bit Server VM (build 11.0.21+9-post-Ubuntu-0ubuntu122.04, mixed mode, sharing)

Up until here all is ok. When I connect to the VM through nomachine or similar, all works fine.

But when I login through ssh using Visual Studio Code, this appears:

ubuntu@go-v12as34df:~$ java -version
openjdk version "21.0.2" 2024-01-16 LTS
OpenJDK Runtime Environment Temurin-21.0.2+13 (build 21.0.2+13-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.2+13 (build 21.0.2+13-LTS, mixed mode, sharing)

But this does not happen when I open VS Code through nomachine...

When I check the 'Configure Runtime for Projects' it appears the Java Version 11 as specified in my project's pom file as well so that's ok.

How can I specify the java version to be Java 11 in VS Code? I have tried the sudo update-java-alternatives but it just does not work and can't download the Java version in my main pc because it's a work pc limited by corporate IT.

Thanks!

I just accepted your answer. Thanks!

kiwidiwi
– kiwidiwi

2024-02-06 12:05:57 +00:00
Commented Feb 6, 2024 at 12:05 — kiwidiwi
– kiwidiwi, Commented Feb 6, 2024 at 12:05

JialeDu · Accepted Answer · 2024-01-24 05:38:36Z

1

First your machine must have the corresponding JDK version installed, then you can specify the JDK using the following setting:

"java.configuration.runtimes": [
  {
    "name": "JavaSE-1.8",
    "path": "/usr/local/jdk1.8.0_201"
  },
  {
    "name": "JavaSE-11",
    "path": "/usr/local/jdk-11.0.3",
    "sources" : "/usr/local/jdk-11.0.3/lib/src.zip",
    "javadoc" : "https://docs.oracle.com/en/java/javase/11/docs/api",
    "default":  true
   },
   {
    "name": "JavaSE-12",
    "path": "/usr/local/jdk-12.0.2"
   },
   {
    "name": "JavaSE-13",
    "path": "/usr/local/jdk-13"
   }
]

https://code.visualstudio.com/docs/java/java-project#_configure-runtime-for-projects

answered Jan 24, 2024 at 5:38

JialeDu

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kiwidiwi Over a year ago

Thanks, it worked. Although I also had to change a few more variables in the settings.json file (mainly: "terminal.integrated.defaultProfile.osx": "JavaSE-11", "terminal.integrated.defaultProfile.linux": "JavaSE-11"). But it was that!

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