| Re: [temurin-dev] .jinfo file specifications |
In the context of .jinfo files (used by the update-java-alternatives tool in Debian-based systems), the prefixes like hl, jdk, and jdkhl indicate which types of Java installations the command applies to. Here’s what each of them means:
Applies to JREs or headless Java environments, i.e., installations without GUI support.
These are typically runtime-only tools that do not require a full JDK or graphical components.
Examples: java, jfr, keytool, rmiregistry, jrunscript.
Applies only to full JDK environments, i.e., not JREs or headless JREs.
These tools are typically developer-specific tools that wouldn’t be included in a lightweight or runtime-only setup.
Example: jconsole (needs GUI support and is not in headless environments).
Applies to both JDKs and headless environments.
These are tools that require development tools (from JDK) but do not require GUI components, so they work in both JDK and headless setups.
Examples: javac, javadoc, jlink, jmod, jshell, jmap, etc.
|
Prefix |
Stands For |
Used in… |
GUI Required? |
Developer Tools? |
|---|---|---|---|---|
|
hl |
Headless |
JRE/Headless JDK |
❌ No |
❌ No |
|
jdk |
JDK-only |
Full JDK w/ GUI |
✅ Yes |
✅ Yes |
|
jdkhl |
JDK Headless |
JDK & JDK Headless |
❌ No |
✅ Yes |
This tagging helps tools like update-java-alternatives or scripts that manage multiple JVMs decide which binaries to expose based on the system or package type (e.g., headless server vs. developer desktop).
_______________________________________________Hi,
I'd like to know exactly what jdkhl and hl and jdk mean in the .jinfo file that is installed. For example, in `.temurin-21-jdk-amd64.jinfo`.
jdkhl jar /usr/lib/jvm/temurin-21-jdk-amd64/bin/jar
jdkhl jarsigner /usr/lib/jvm/temurin-21-jdk-amd64/bin/jarsigner
hl java /usr/lib/jvm/temurin-21-jdk-amd64/bin/java
jdkhl javac /usr/lib/jvm/temurin-21-jdk-amd64/bin/javac
jdkhl javadoc /usr/lib/jvm/temurin-21-jdk-amd64/bin/javadoc
jdkhl javap /usr/lib/jvm/temurin-21-jdk-amd64/bin/javap
jdkhl jcmd /usr/lib/jvm/temurin-21-jdk-amd64/bin/jcmd
jdk jconsole /usr/lib/jvm/temurin-21-jdk-amd64/bin/jconsole
jdkhl jdb /usr/lib/jvm/temurin-21-jdk-amd64/bin/jdb
jdkhl jdeprscan /usr/lib/jvm/temurin-21-jdk-amd64/bin/jdeprscan
jdkhl jdeps /usr/lib/jvm/temurin-21-jdk-amd64/bin/jdeps
hl jfr /usr/lib/jvm/temurin-21-jdk-amd64/bin/jfr
jdkhl jhsdb /usr/lib/jvm/temurin-21-jdk-amd64/bin/jhsdb
jdkhl jimage /usr/lib/jvm/temurin-21-jdk-amd64/bin/jimage
jdkhl jinfo /usr/lib/jvm/temurin-21-jdk-amd64/bin/jinfo
jdkhl jlink /usr/lib/jvm/temurin-21-jdk-amd64/bin/jlink
jdkhl jmap /usr/lib/jvm/temurin-21-jdk-amd64/bin/jmap
jdkhl jmod /usr/lib/jvm/temurin-21-jdk-amd64/bin/jmod
jdkhl jpackage /usr/lib/jvm/temurin-21-jdk-amd64/bin/jpackage
jdkhl jps /usr/lib/jvm/temurin-21-jdk-amd64/bin/jps
hl jrunscript /usr/lib/jvm/temurin-21-jdk-amd64/bin/jrunscript
jdkhl jshell /usr/lib/jvm/temurin-21-jdk-amd64/bin/jshell
jdkhl jstack /usr/lib/jvm/temurin-21-jdk-amd64/bin/jstack
jdkhl jstat /usr/lib/jvm/temurin-21-jdk-amd64/bin/jstat
jdkhl jstatd /usr/lib/jvm/temurin-21-jdk-amd64/bin/jstatd
jdkhl jwebserver /usr/lib/jvm/temurin-21-jdk-amd64/bin/jwebserver
hl keytool /usr/lib/jvm/temurin-21-jdk-amd64/bin/keytool
hl rmiregistry /usr/lib/jvm/temurin-21-jdk-amd64/bin/rmiregistry
jdkhl serialver /usr/lib/jvm/temurin-21-jdk-amd64/bin/serialver
hl jexec /usr/lib/jvm/temurin-21-jdk-amd64/lib/jexec
hl jspawnhelper /usr/lib/jvm/temurin-21-jdk-amd64/lib/jspawnhelper
In https://github.com/adoptium/installer I haven't found anything, except jinfo.in which seems a template, but it does not provide any explanation.
Thank you,Luca
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