Debug java in vscode

My computer is Mac M1.

show all the java version

/usr/libexec/java_home -V

we can see :

Matching Java Virtual Machines:
    17.0.11 (x86_64) "Homebrew" - /Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home
    1.8.0_391 (x86_64) "Java SE 8" - /Library/Java/JavaVirtualMachines/jdk1.8.0_391.jdk/Contents/Home

because the vscode need v17+ at least , so if you can't found 17+, you can intall it .

install jdk 17 or others.

brew install openjdk@8
brew install openjdk@11
brew install openjdk@17

they can coexist. so don't worry it will confused your envriments.

now we can show the env, if you can't see the jkd17 after exec brew install openjdk@17 , you need exec this:

sudo ln -sfn /opt/homebrew/opt/openjdk@17/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-17.jdk

and add the path to zshell

echo 'export PATH="/opt/homebrew/opt/openjdk@17/bin:$PATH"' >> /Users/[your name]/.zshrc

OK , we edit the vscode configrations .

settings.json

{
  // let Oracle Java extensions LSP to use 17
  "jdk.jdkhome": "/Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home",

  // if you project always use the old version 1.8 , you can set this.
  // "jdk.project.jdkhome": "/Library/Java/JavaVirtualMachines/jdk1.8.0_391.jdk/Contents/Home"
}

the next, we need to install plugins to better support java

• Java Extension Pack
• Language Support for Java(TM) by Red Hat
• Debugger for Java
• Maven for Java（if use Maven）
• Gradle for Java（if use Gradle）
• Lombok Annotations Support for VS Code

for Lombok , if your @Data or @Setter / @Getter don't working , we need to set the config path. first find the path

find ~/.m2/repository -name "lombok-*.jar"

if we install lombok by maven , so we can see:

/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.26/lombok-1.18.26.jar
/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.24/lombok-1.18.24.jar
/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.30/lombok-1.18.30.jar
/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.30/lombok-1.18.30-sources.jar
/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.30/lombok-1.18.30-javadoc.jar

edit .vscode/settings.json add:

{
  "java.compile.nullAnalysis.mode": "automatic",
  "jdk.jdkhome": "/opt/homebrew/Cellar/openjdk@17/17.0.16/libexec/openjdk.jdk/Contents/Home",
  "jdk.project.jdkhome": "/Library/Java/JavaVirtualMachines/jdk1.8.0_361.jdk/Contents/Home",
  "java.jdt.ls.vmargs": "-javaagent:/Users/[your name]/.m2/repository/org/projectlombok/lombok/1.18.30/lombok-1.18.30.jar"
}

now, reload the vscode. all done.