# Installing Java with SDKMAN on Raspberry Pi > Java on Raspberry Pi has always been possible, but SDKMAN makes the getting-started process a lot easier. It's as easy as pi... - URL: https://foojay.io/today/installing-java-with-sdkman-on-raspberry-pi/ - Published: 2022-02-07 - Authors: Frank Delporte - Categories: Embedded, Raspberry Pi If you create a new SD card for a Raspberry Pi with the operating system, you can choose the "Raspberry Pi OS Full (32-bit)" edition, which includes Java 11. But a lot of the other available OS-versions don't have Java included. There are many ways to install Java but, personally, I find [SDKMAN](https://sdkman.io/ "SDKMAN") the easiest one to use. It allows you to easily install a JDK, but also to switch between different versions. > **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. A nice video with a [full demo of SDKMAN is available here on foojay.io](https://foojay.io/today/video-sdkman-explained/). SDKMAN can show you a list of available JDK-distributions based on the operating system and architecture. Until recently that didn't work on Raspberry Pi because that runs on ARM. But as this is an open-source project it is possible to request new features and help to achieve the solution. As you can see in [GitHub issue #836](https://github.com/sdkman/sdkman-cli/issues/836), this required some rework in different parts of the project. But we have a working version now!!! ## Try it out If you want to dive in directly, grab yourself a Raspberry Pi, open a terminal and install ZIP and SDKMAN. ``` $ sudo apt install zip $ curl -s "https://beta.sdkman.io" | bash # Open a new terminal or run this command $ source "$HOME/.sdkman/bin/sdkman-init.sh" $ sdk list java ================================================================================ Available Java Versions for Linux ARM 32bit Hard Float ================================================================================ Vendor | Use | Version | Dist | Status | Identifier -------------------------------------------------------------------------------- Liberica | | 17.0.1 | librca | | 17.0.1-librca | | 11.0.13 | librca | | 11.0.13-librca Zulu | | 11.0.13 | zulu | | 11.0.13-zulu | | 8.0.312 | zulu | | 8.0.312-zulu ================================================================================ ``` Yep, that's right, even for the Raspberry Pi different distributions can be used! So let's try out Azul Zulu 11. ``` $ sdk install java 11.0.13-zulu $ java -version openjdk version "11.0.13" 2021-10-19 LTS OpenJDK Runtime Environment Zulu11.52+13-CA (build 11.0.13+8-LTS) OpenJDK Client VM Zulu11.52+13-CA (build 11.0.13+8-LTS, mixed mode) ``` Confirmed! Azul Zulu 11 installed with SDKMAN runs fine on a Raspberry Pi. Side note: although both Liberica and Zulu are listed for "Linux ARM 32bit Hard Float", **only Zulu works on ARMv6, e.g. the Raspberry Pi Zero 1**. At this point BellSoft has no plans to support this processor. ## About the processor architecture As there are multiple Raspberry Pi versions since 2013 ([full history on Wikipedia](https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications)), different ARM processor types were used. The ARMv6 only supports 32-bit, while ARMv7 is a 64-bit processor. The architecture can be checked with the `uname` command and these are some of the outputs: | | | | |---------------------|------------------|------------| | Board | Operating System | `uname -m` | | Raspberry Pi Zero 1 | 32-bit | armv6l | | Raspberry Pi 4 | 32-bit | armv7l | | Raspberry Pi 4 | 64-bit | aarch64 | If you want to know more about your system, use the `lscpu` command, this is the output on a Raspberry Pi 4 with 32-bit OS: ``` $ lscpu Architecture: armv7l Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 1 Core(s) per socket: 4 Socket(s): 1 Vendor ID: ARM Model: 3 Model name: Cortex-A72 Stepping: r0p3 CPU max MHz: 1500.0000 CPU min MHz: 600.0000 BogoMIPS: 108.00 Flags: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 ``` ## 64-bit Operating System After a long time of trialing a beta version, on February 2th, Raspberry Pi officially announced a 64-bit version of their operating system. You can [read more about this release on the Raspberry Pi Blog](https://www.raspberrypi.com/news/raspberry-pi-os-64-bit/). And because this is a more used architecture, the output of SDKMAN is really impressive... ``` ================================================================================ Available Java Versions for Linux ARM 64bit ================================================================================ Vendor | Use | Version | Dist | Status | Identifier -------------------------------------------------------------------------------- AdoptOpenJDK | | 8.0.275+1.hs | adpt | | 8.0.275+1.hs-adpt | | 8.0.252.hs | adpt | | 8.0.252.hs-adpt Corretto | | 17.0.2.8.1 | amzn | | 17.0.2.8.1-amzn | | 17.0.0.35.1 | amzn | | 17.0.0.35.1-amzn ... 45 EXTRA LINES HERE Temurin | | 17.0.2 | tem | | 17.0.2-tem | | 11.0.14 | tem | | 11.0.14-tem | | 8.0.322 | tem | | 8.0.322-tem Zulu | | 17.0.2 | zulu | | 17.0.2-zulu | | 11.0.14 | zulu | | 11.0.14-zulu | | 8.0.322 | zulu | | 8.0.322-zulu ================================================================================ ``` So using the Temurin 17 version is as easy as `sdk install java 17.0.2-tem`: ``` $ sdk install java 17.0.2-tem Downloading: java 17.0.2-tem In progress... ################################################################################################################################################################################ 100.0%################################################################################################################################################################################ 100.0% Repackaging Java 17.0.2-tem... Done repackaging... Installing: java 17.0.2-tem Done installing! Setting java 17.0.2-tem as default. $ java -version openjdk version "17.0.2" 2022-01-18 OpenJDK Runtime Environment Temurin-17.0.2+8 (build 17.0.2+8) OpenJDK 64-Bit Server VM Temurin-17.0.2+8 (build 17.0.2+8, mixed mode, sharing) ``` ## Conclusion Java on Raspberry Pi has always been possible, but SDKMAN makes the getting-started process a lot easier. Installing a first JDK or changing the version has now become a piece of cake pi(e)!