OpenJDK 20 Download and Installation on Windows, MacOS, Linux & Ubuntu

OpenJDK Developers Guide

Quick guide to download and install OpenJDK 20 on Windows. - OpenJDK Community Version





OpenJDK is the short form of Open Java Development Kit similar to Oracle's Java Development Kit used to develop Java Applications. Main difference between Oracle JDK and OpenJDK is that OpenJDK is free for all while Oracle Java Development Kit or Oracle JDK requires commercial license. For more details refer openjdk vs oracle jdk


If you want to know more about OpenJDK, you can go through Open Java Development Kit Quick guide.


Note: To uninstall previously installed OpenJDK please refer Uninstall OpenJDK Windows




OpenJDK 20 is the latest release of the open-source implementation of the Java Platform, Standard Edition (Java SE). It brings several new features, enhancements, and bug fixes to improve the performance, security, and functionality of the Java runtime environment.




OpenJDK 20 introduces several key features:

  • Improved Performance
    • Enhancements in JIT compiler optimizations.
    • Reduced memory footprint and improved startup times.
  • New Language Features
    • Introduction of new language features like pattern matching for instanceof, sealed classes, and records.
  • Security Enhancements
    • Improved security with new cryptographic algorithms and security protocols.
  • Other Notable Features
    • Support for new platforms and architectures.
    • Updated APIs and libraries.


Before installing OpenJDK 20, ensure that your system meets the following requirements:

  • Operating System: Windows, macOS, Linux
  • Disk Space: Minimum 200 MB
  • RAM: Minimum 1 GB


  • Installing OpenJDK 20 on Windows
    • Download the OpenJDK 20 distribution for Windows from the official website https://jdk.java.net/archive/
    • Choose suitable build from the list
      • OpenJDK 20 download from archives
    • Run the installer and follow the on-screen instructions.
    • Set the JAVA_HOME environment variable.
  • Installing OpenJDK 20 on macOS
    • Use Homebrew to install OpenJDK 20: 
      • 
brew install openjdk@20
    • Set the JAVA_HOME environment variable.
  • Installing OpenJDK 20 on Linux
    • Install OpenJDK 20 using your distribution's package manager:
      • Ubuntu/Debian:?
        • 
sudo apt-get install openjdk-20-jdk
      • CentOS/RHEL: 
        • 
sudo yum install java-20-openjdk-devel
  • Set the JAVA_HOME environment variable.



To set the JAVA_HOME environment variable:

  • Windows:
    • 
set JAVA_HOME=C:\Path\to\your\OpenJDK-20
set PATH=%JAVA_HOME%\bin;%PATH%
  • macOS/Linux: 
    • 
export JAVA_HOME=/usr/lib/jvm/java-20-openjdk
export PATH=$JAVA_HOME/bin:$PATH



To verify that OpenJDK 20 is installed correctly, run the following command in your terminal or command prompt: 


java -version



To update OpenJDK 20, download the latest version from the official website and reinstall it using the installation instructions provided above.



OpenJDK 20 offers significant improvements and new features that enhance the Java development experience. By following this guide, you can successfully install, configure, and use OpenJDK 20 on your system.



  • Official OpenJDK Website: openjdk.java.net
  • Oracle Java Documentation: docs.oracle.com/javase




Note:
Here is the list of OpenJDK known-issues OpenJDK Known Issues



Download OpenJDK - here are the OpenJDK versions you might be interested in!


OpenJDK 7 Download Windows 64 bit
OpenJDK 8 Download Windows 64 bit
OpenJDK 9 Download Windows 64 bit
OpenJDK 10 Download Windows 64 bit
OpenJDK 11 Download Windows 64 bit
OpenJDK 12 Download Windows 64 bit

If you are looking out for earlier OpenJDK versions, go to OpenJDK Archive











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