What is SDKMAN?

SDKMAN! is a versatile development tool designed specifically for users of GNU/Linux and MacOS. With SDKMAN!, you can effortlessly install and oversee a variety of software components such as Java, Scala, Groovy, Maven, and numerous other tools and libraries that are part of the JVM ecosystem.

Installation

curl -s "https://get.sdkman.io" | bash

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                                                                 Now attempting installation...


Looking for a previous installation of SDKMAN...
SDKMAN found.

======================================================================================================
 You already have SDKMAN installed.
 SDKMAN was found at:

    /home/coffeina/.sdkman

 Please consider running the following if you need to upgrade.

    $ sdk selfupdate force

======================================================================================================

source "$HOME/.sdkman/bin/sdkman-init.sh"

Usage

Commands to manage candidates (SDKs and other tools):

install or i: install a candidate version
uninstall or rm: uninstall a candidate version
list or ls: list available candidate versions
use or u: use a candidate version in current shell
default or d: set the default candidate version for every shell
current c: display current candidate version
upgrade or ug: upgrade outdated candidate version

Utility commands:

version or v: display the current version of sdk
broadcast or b: display the last broadcast message
help or h: show the sdk help message
offline: enable or disable offline mode
selfupdate: update the sdk
flush: flush sdk local state

Manage Java Version

sdk install java

================================================================================
Available Java Versions for Linux 64bit
================================================================================
 Vendor        | Use | Version      | Dist    | Status     | Identifier
--------------------------------------------------------------------------------
 Corretto      |     | 22           | amzn    |            | 22-amzn             
               |     | 21.0.2       | amzn    |            | 21.0.2-amzn         
               |     | 21.0.1       | amzn    |            | 21.0.1-amzn         
               |     | 17.0.10      | amzn    |            | 17.0.10-amzn        
               |     | 17.0.9       | amzn    |            | 17.0.9-amzn         
               |     | 11.0.22      | amzn    |            | 11.0.22-amzn        
               |     | 11.0.21      | amzn    |            | 11.0.21-amzn        
               |     | 8.0.402      | amzn    |            | 8.0.402-amzn        
               |     | 8.0.392      | amzn    |            | 8.0.392-amzn        
 Dragonwell    |     | 17.0.10      | albba   |            | 17.0.10-albba       
               |     | 17.0.9       | albba   |            | 17.0.9-albba

All installed Java versions will be available in the folder:

ls $SDKMAN_DIR/candidates/java -l

To verify whether the installation was successful, you can confirm the current Java version. However, note that in Java 8 or earlier versions, the command java --version:

java --version
openjdk 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)

Connclusion

SDKMAN! is a must-have for developers working with Java, Groovy, or any JVM-based language. Give it a try, and you won’t be disappointed.

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SDKMAN! - Multiple versions of Java

Table of contents:

What is SDKMAN?

Installation

Usage

Manage Java Version

Connclusion

Reference: