Change the default Java (JDK) version on macOS
First run /usr/libexec/java_home -V to check available Java Virtual Machine:
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Matching Java Virtual Machines (2):
20.0.1 (arm64) "Eclipse Adoptium" - "OpenJDK 20.0.1" /Library/Java/JavaVirtualMachines/temurin-20.jdk/Contents/Home
17.0.7 (arm64) "Eclipse Adoptium" - "OpenJDK 17.0.7" /Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/temurin-20.jdk/Contents/Home
Change the default Java (JDK) version
Pick the version you want to be the default (20.0.1) then:
export JAVA_HOME="/usr/libexec/java_home -v 20.0.1"
Now when you run java -version you will see:
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openjdk version "20.0.1" 2023-04-18
OpenJDK Runtime Environment Temurin-20.0.1+9 (build 20.0.1+9)
OpenJDK 64-Bit Server VM Temurin-20.0.1+9 (build 20.0.1+9, mixed mode)
Add the
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export JAVA_HOME="/usr/libexec/java_home -v 20.0.1"
line to your shell’s init file.
Updating the .zshrc file should work:
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nano ~/.zshrc
paste the line
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export JAVA_HOME=$(/usr/libexec/java_home -v 20.0.1)
at bottom of the file.
Press CTRL+X to exit the editor, Press Y to save your changes.
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source ~/.zshrc
echo $JAVA_HOME
java -version
Fast switch between different JDK versions
- Add the below function in your
~/.bashrcor~/.zshrc
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jdk() {
version=$1
export JAVA_HOME=$(/usr/libexec/java_home -v"$version");
java -version
}
- Source the profile and you can change the version like below:
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jdk 17
jdk 20
References
This post is licensed under CC BY 4.0 by the author.