Installing and using OpenJDK 8 for Windows

OpenJDK 8

Red Hat Developer Customer Content Services

Abstract

OpenJDK 8 for Windows is a Red Hat offering on the Microsoft Windows platform. The Installing and using OpenJDK 8 for Windows guide provides an overview of this product and explains how to install the software and start using it.

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Chapter 1. OpenJDK overview

OpenJDK (Open Java Development Kit) is a free and open source implementation of the Java Platform, Standard Edition (Java SE). The Red Hat build of OpenJDK is available in two versions, OpenJDK 8u and OpenJDK 11u.

Packages for the Red Hat build of OpenJDK are made available on Red Hat Enterprise Linux and Microsoft Windows and shipped as a JDK and JRE in the Red Hat Container Catalog.

Chapter 2. OpenJDK 8 for Windows installation options

OpenJDK 8 for Windows can be installed manually using an archive or through a graphical user interface using an MSI-based installer.

Depending on your circumstance, use one of the following installation methods:

Chapter 3. Installing OpenJDK 8 for Windows with the archive

This procedure describe how to manually install OpenJDK 8 for Windows using the archive.

Procedure

  1. Download the archive of OpenJDK 8 for Windows.
  2. Extract the contents of the archive to a directory of your choice.

    Note

    Extracting the contents of the archive to a directory path that does not contain spaces is recommended.

  3. Update the PATH as below:

    1. Add the bin directory contained in your OpenJDK 8 for Windows installation path to the %PATH% environment variable:

      C:\> setx /m PATH "%PATH%;C:\Progra~1\RedHat\java-1.8.0-openjdk-1.8.0.181-1\bin"

      If the path contains spaces, use the shortened path name.

    2. Restart Command Prompt to reload the environment variables.
  4. Verify the OpenJDK 8 for Windows is successfully installed, run java -version command in a command prompt and you must get the following output:

    java version "1.8.0_181"
    Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
    Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
  5. The %JAVA_HOME% environment variable must also be set to use some developer tools. Set the %JAVA_HOME% environment variable as follows:

    1. Open Command Prompt as an administrator.
    2. Set the value of the environment variable to your OpenJDK 8 for Windows installation path:

      C:\> setx /m JAVA_HOME "C:\Progra~1\RedHat\java-1.8.0-openjdk-1.8.0.181-1"

      If the path contains spaces, use the shortened path name.

    3. Restart Command Prompt to reload the environment variables

Chapter 4. Updating OpenJDK 8 for Windows using the archive

OpenJDK 8 for Windows can be manually update using the archive.

Procedure

  1. Download the archive of OpenJDK 8 for Windows.
  2. Extract the contents of an archive to a directory of your choice.

    Note

    Extracting the contents of an archive to a directory path that does not contain spaces is recommended.

  3. On Command Prompt, update JAVA_HOME environment variable as follows:

    1. Open Command Prompt as an administrator.
    2. Set the value of the environment variable to your OpenJDK 8 for Windows installation path:

      C:\> setx /m JAVA_HOME "C:\Progra~1\RedHat\java-8-openjdk-1.8.0_181"

      If the path contains spaces, use the shortened path name.

    3. Restart Command Prompt to reload the environment variables.
  4. Set the value of PATH variable if it is not set already:

      C:\> setx -m PATH "%PATH%;%JAVA_HOME%\bin";
  5. Restart Command Prompt to reload the environment variables.
  6. Verify that java -version works without supplying the full path.

    C:\> java -version
    java version "1.8.0_181"
    Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
    Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

Chapter 5. Installing OpenJDK with the MSI installer

This procedure discribes how to install OpenJDK 8 for Windows using the MSI-based installer.

Procedure

  1. Download the MSI-based installer of OpenJDK 8 for Windows.
  2. Run the installer OpenJDK 8 for Windows.
  3. Click Next on the welcome screen.
  4. Check I accept the terms in license agreement, then click Next.
  5. Click Next.
  6. Accept the defaults or review the optional properties.
  7. Click Install.
  8. Click Yes on the Do you want to allow this app to make changes on your device?.
  9. Verify the OpenJDK 8 for Windows is successfully installed, run java -version command in the command prompt and you must get the following output:

    java version "1.8.0_181"
    Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
    Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

Chapter 6. OpenJDK MSI installer components

The OpenJDK 8 for Windows MSI-based installer includes the following components:

jdk
Runtime environment files (excluding development tools).
jdk_devel
Java Development Kit files.
jdk_registry_standard

Registry keys:

HKLM\Software\JavaSoft\Java Runtime Environment, entries:
  CurrentVersion: 1.8

HKLM\Software\JavaSoft\Java Runtime Environment\1.8, entries:
  JavaHome: <INSTALLDIR>\jre\
  RuntimeLib: <INSTALLDIR>\jre\bin\server\jvm.dll

HKLM\Software\JavaSoft\Java Runtime Environment\1.8_<update>, entries:
  JavaHome: <INSTALLDIR>\jre\
  RuntimeLib: <INSTALLDIR>\jre\bin\server\jvm.dll
jdk_registry_standard_devel

Registry keys:

HKLM\Software\JavaSoft\Java Development Kit, entries:
  CurrentVersion: 1.8

HKLM\Software\JavaSoft\Java Development Kit\1.8, entries:
  JavaHome: <INSTALLDIR>
  RuntimeLib: <INSTALLDIR>\jre\bin\server\jvm.dll

HKLM\Software\JavaSoft\Java Development Kit\1.8_<update>, entries:
  JavaHome: <INSTALLDIR>
  RuntimeLib: <INSTALLDIR>\jre\bin\server\jvm.dll
jdk_env_path
Appends <INSTALLDIR>\bin and <INSTALLDIR>\jre\bin to the system %PATH% environment variable.
jdk_env_java_home
Sets <INSTALLDIR> to the system %JAVA_HOME% environment variable.
jdk_env_vendor_java_home
Sets <INSTALLDIR> to the system %REDHAT_JAVA_HOME% environment variable.
jdk_registry_jar
Association for JAR files. Launch JAR files using the OpenJDK context menu.
webstart
WebStart files, installed into <INSTALLDIR>\webstart.
webstart_registry
Association for JNLP files and jnlp:// URLs.
webstart_env
Appends <INSTALLDIR>\webstart to the system %PATH% environment variable.
webstart_migrate
Migrate WebStart local settings and cache on update.

Appendix A. MSI-based installer properties

The OpenJDK 8 for Windows MSI-based installer includes the JDK Files component and the following optional properties:

Table A.1. OpenJDK 8 for Windows MSI-based installer properties

PropertyDescriptionDefault valueOpenJDK 8 for Windows

OpenJDK Runtime - Windows Registry

The following registry keys are set HKLM\Software\JavaSoft\JDK\<version>, entries: JavaHome: <INSTALLDIR> RuntimeLib: <INSTALLDIR>\bin\server\jvm.dll HKLM\Software\JavaSoft\JDK, entries: CurrentVersion: <version>

Yes

Yes

OpenJDK Runtime - Path Variable

Adds the Runtime to the Path variable so it is available from the command line.

Yes

Yes

OpenJDK Runtime - JAVA_HOME System Variable

JAVA_HOME is used by some programs to find the Java runtime.

No

Yes

OpenJDK Runtime - REDHAT_JAVA_HOME System Variable

REDHAT_JAVA_HOME will be used in the future for Mission Control.

No

Yes

OpenJDK Runtime - Jar Files Association

This enables Jar files to be run from within Windows Explorer.

No

Yes

Web Start (Beta) - JNLP File Association

Enables the launching of JNLP files downloaded from the web.

No

No

Web Start (Beta) - PATH Variable

Enables the launching of JNLP files downloaded from the web from the local file system.

No

No

Web Start (Beta) - Keep Settings and Cache

Keeps settings and caches on the local file system.

No

No

Mission Control - Path Variable

Adds Mission Control to the Path Variable so it is available from the command line.

No

Yes

Revised on 2021-04-22 14:38:12 UTC

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