---
type: source
title: "Java/OpenJDK Support and Downloads"
tags: [java, openjdk, software-installation, groupware]
related: [openjdk, gota-modul, icedtea-webstart]
created: 2026-07-01
updated: 2026-07-01
authors: []
year: 2026
url: "https://rz.uni-greifswald.de/support/downloads/software/javaopenjdk"
venue: "Universitätsrechenzentrum (URZ)"
sources: ["output/rz_uni_greifswald_de_support_downloads_software_javaopenjdk.md"]
---

# Java/OpenJDK Support and Downloads

This source provides guidance from the Universitätsrechenzentrum (URZ) regarding the installation and use of Java environments at the Universität Greifswald.

## Key Recommendations
- **Oracle Java Deprecation**: The URZ strongly recommends uninstalling Oracle Java (specifically versions from Java SE 8 Update 211 onwards) due to the shift to a paid licensing model for software packages and security updates.
- **OpenJDK Adoption**: OpenJDK is the recommended open-source alternative. Version 11 is generally recommended for most users.

## Technical Requirements for GOTA
For users needing to edit files directly within [[groupware]] via the **GOTA-Modul**, specific requirements apply:
- **Version**: OpenJDK version 8 must be used.
- **Component**: The **IcedTea WebStart** feature must be installed to handle `.jnlp` files.

## Distribution Options
The URZ lists several recommended OpenJDK distributions:
- **AdoptOpenJDK**
- **Amazon Corretto**
- **SapMachine** (Version 11+)
- **ojdkbuild** (Specifically for Windows)

## OS-Specific Implementation
- **Windows**: Using `ojdkbuild`, users must ensure the WebStart feature is selected during installation and manually associate `.jnlp` files with the `javaws` executable.
- **Ubuntu**: Packages are available via `apt-get`. The `icedtea-plugin` is required for GOTA functionality. To resolve "TrayIcon not supported" errors, the `gnome-shell-extension-top-icons-plus` package should be installed.
