How to Install Multiple Java Versions via SDKMAN on Ubuntu ..!

SDKMAN! is a tool for managing parallel versions of multiple Software Development Kits on most Unix based systems. It provides a convenient Command Line Interface (CLI) and API for installing, switching, removing and listing Candidates. Formerly known as GVM the Groovy Environment Manager.

It also allows the developers to install JVM-based SDKs like Java, Groovy, Scala, Kotlin, and Ceylon. Maven, Gradle, SBT, Spring Boot, Vert.x, and many others are also supported. SDKMAN! is a free, lightweight, open-source utility written in Bash.

How to Install Multiple Java Version via SDKMAN on Ubuntu Using 10 Easy Steps

Step 1: Update Your System
```
 $ sudo apt-get update
```
Step 2: Install Prerequisites - Zip, Unzip
```
 $ sudo apt install zip
```

Step 3: Install SDKMAN

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

Step 4: Follow the on-screen instructions to complete the installation and verify.
```
 $ source "$HOME/.sdkman/bin/sdkman-init.sh"
```
Step: Find Java Versions available.
```
 $ sdk list java
```
Step 6: Install Java 19.0.2 Version
```
 $ sdk install java 19.0.2-open
```
Step 7: Verify Installed Java Version
```
 $ java --version
```
Step 8: Install Java 20.0.1 Version and default option give

Yes / No (based on requirement) and Verify Currently Installed Java Versions.

$ sdk install java 20.0.1-open

$ sdk java list

Step 9: Whenever need another Java version change default

$ sdk default java 20.0.1-open

Step 10: If you need remove any Java version First change default version to another Java version then uninstall required Java version and verify also
```
 $ sdk uninstall java 20.0.1-open
```
```
 $ sdk java list
```

Reference

https://sdkman.io/

How to Install Multiple Java Versions via SDKMAN on Ubuntu ..!

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