tldr/pages/common/cs-java.md

# cs java

> The `java` and `java-home` commands fetch and install JVMs. The `java` command runs them too.
> More information: <https://get-coursier.io/docs/cli-java>.

- Display Java version by using coursier:

`cs java -version`

- Call a specific Java version with custom properties using coursier:

`cs java --jvm {{jvm_name}}:{{jvm_version}} -Xmx32m -X{{another_jvm_opt}} -jar {{path/to/jar_name.jar}}`

- List all the available JVM in the coursier default index:

`cs java --available`

- List all the installed JVM in the system with his own location:

`cs java --installed`

- Set a specific JVM as one-off default for the shell instance:

`cs java --jvm {{jvm_name}}:{{jvm_version}} --env`

- Revert the changes for the default JVM settings:

`eval "$(cs java --disable)"`

- Set a specific JVM as default for the whole system:

`cs java --jvm {{jvm_name}}:{{jvm_version}} --setup`