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Installing and using Red Hat build of OpenJDK 21 for Windows

Red Hat build of OpenJDK 21

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Abstract

Red Hat build of OpenJDK 21 for Windows is a Red Hat offering on the Microsoft Windows platform. The Installing and using Red Hat build of OpenJDK 21 for Windows guide provides an overview of this product and explains how to install the software and start using it.

To report an error or to improve our documentation, log in to your Red Hat Jira account and submit an issue. If you do not have a Red Hat Jira account, then you will be prompted to create an account.

Procedure

  1. Click the following link to create a ticket.
  2. Enter a brief description of the issue in the Summary.
  3. Provide a detailed description of the issue or enhancement in the Description. Include a URL to where the issue occurs in the documentation.
  4. Clicking Submit creates and routes the issue to the appropriate documentation team.

Making open source more inclusive
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Red Hat is committed to replacing problematic language in our code, documentation, and web properties. We are beginning with these four terms: master, slave, blacklist, and whitelist. Because of the enormity of this endeavor, these changes will be implemented gradually over several upcoming releases. For more details, see our CTO Chris Wright’s message.

Red Hat build of OpenJDK 21 for Microsoft Windows can be installed 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:

This procedure describes how to manually install Red Hat build of OpenJDK 21 for Microsoft Windows using the archive.

Procedure

  1. Download the archive of Red Hat build of OpenJDK 21 for Microsoft 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. Update the PATH as below:

    1. Add the bin directory contained in your Red Hat build of OpenJDK 21 for Microsoft Windows installation path to the %PATH% environment variable: 

      C:\> setx /m PATH "%PATH%;C:\Progra~1\RedHat\java-21-openjdk-<version>\bin"
      Copy to Clipboard Toggle word wrap

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

    2. Restart Command Prompt to reload the environment variables.
  4. To verify the Red Hat build of OpenJDK 21 for Microsoft Windows is successfully installed, run the java -version command in a command prompt.

  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 Red Hat build of OpenJDK 21 for Microsoft Windows installation path: 

      C:\> setx /m JAVA_HOME "C:\Progra~1\RedHat\java-21-openjdk-<version>"
      Copy to Clipboard Toggle word wrap

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

    3. Restart Command Prompt to reload the environment variables.

Red Hat build of OpenJDK 21 for Microsoft Windows can be manually updated using the archive.

Procedure

  1. Download the archive of Red Hat build of OpenJDK 21.

  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 Red Hat build of OpenJDK 21 for Microsoft Windows installation path: 

      C:\> setx /m JAVA_HOME "C:\Progra~1\RedHat\java-21-openjdk-<version>"
      Copy to Clipboard Toggle word wrap

      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";
    Copy to Clipboard Toggle word wrap
  5. Restart Command Prompt to reload the environment variables.

  6. Verify that java -version works without supplying the full path. 

    C:\> java -version
    Copy to Clipboard Toggle word wrap

This procedure describes how to install Red Hat build of OpenJDK 21 for Microsoft Windows using the MSI-based installer.

Procedure

  1. Download the MSI-based installer of Red Hat build of OpenJDK 21 for Microsoft Windows.
  2. Run the installer for Red Hat build of OpenJDK 21 for Microsoft 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. To verify the Red Hat build of OpenJDK 21 for Microsoft Windows is successfully installed, run java -version command in the command prompt.

You can set the following Red Hat build of OpenJDK 21 for Microsoft Windows MSI-based installer components. Setting these components is optional. If these components are not set, the default settings will be used.

jdk
Java Development Kit (JDK) files. Defaults to true, meaning that the jdk component is enabled.
jdk_registry_runtime

A set of Windows registry keys that other software can use to locate JDK installation files. Defaults to true, meaning that the jdk_registry_runtime component is enabled. This component includes the following registry keys: 

HKLM\Software\JavaSoft\JDK\<version>, entries:
    JavaHome: <INSTALLDIR>
    RuntimeLib: <INSTALLDIR>\bin\server\jvm.dll

HKLM\Software\JavaSoft\JDK, entries:
    CurrentVersion: <version>
Copy to Clipboard Toggle word wrap
jdk_env_path
Appends <INSTALLDIR>\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 with the Red Hat build of OpenJDK context menu.
jmc
JDK Mission Control files, installed into <INSTALLDIR>\missioncontrol.
jmc_env
Appends <INSTALLDIR>\missioncontrol to the system %PATH% environment variable.

Appendix A. MSI-based installer properties
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The Red Hat build of OpenJDK for Windows MSI-based installer includes the JDK Files component and the following optional properties:

Expand
Table A.1. Red Hat build of OpenJDK for Windows MSI-based installer properties
PropertyDescriptionDefault value

OpenJDK Runtime - Windows Registry

Sets registry keys that other software can use to locate JDK installation files.

Yes

OpenJDK Runtime - Path Variable

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

Yes

OpenJDK Runtime - JAVA_HOME System Variable

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

No

OpenJDK Runtime - REDHAT_JAVA_HOME System Variable

REDHAT_JAVA_HOME can be used by some programs to find the Red Hat build of OpenJDK runtime.

No

OpenJDK Runtime - Jar Files Association

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

No

Mission Control - Files

Contains files that are installed in the <installdir>\missioncontrol directory.

No

Mission Control - Path Variable

Appends <installdir>\missioncontrol to the system PATH environment variable.

No

Revised on 2024-05-09 14:55:33 UTC

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