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Java Installation

Java is available for installation from a number of sources. Below are a few of the sources:

• OpenWebStart (Will install Zulu's JDK).
• Eclipse Adoptium's AdoptOpenJDK.
  • If given a choice, choose the HotSpot JVM.
  • If given a choice, choose to install the IcedTeaWeb feature.
• Zulu Commnuity OpenJDK with IcedTea-Web.
• Linux Distribution's Package Repository.
• Oracle OpenJDK.

Notes:

• Your choice of where to get Java is generally based upon the license, features, and ease of installation. A more complete list is sources along with license information is available at Wikipedia. Linux users should generally install Java from their distribution's standard package repository.
• If you already have Java without IcedTea, then all you need to install is AdoptOpenJDK's stand-alone IcedTea builds.
• NASA-managed computers: The Java installed on NASA-managed computers does not include WebStart/IcedTea. You can do one of the following:
  • Install OpenWebStart instead of or in addition to the "NASA" Java. Note that OpenWebStart has an option to install a "personal" copy of Java that will not overwrite a "system" copy of Java such as the Java installed from the "Software Center" or "Self-Service Portal".
  • Install Java from the "Software Center" (Windows 10 computers) or the "Self-Service Portal" (macOS computers) and install a stand-alone IcedTea package (such as AdoptOpenJDK's IcedTea builds and configure it to use the previously installed Java.

Java Version

Java versions after 8 have significant functional and licensing incompatibilities with version 8. SKTEditor runs on 8 and later versions. The following provides some guidance when choosing a version:

• Java 8:
  • Users of Oracle's traditional Java (available from www.java.com and www.oracle.com/java) should choose version 8 because it includes the WebStart component. Newer versions do not include WebStart.
  • Users of AdoptOpenJDK's Java should choose version 8 because the msi installer includes an option to install the IcedTea component.
• Java 11 or higher:
  • If you choose to use Java 11, you must install the IcedTea component. Installing IcedTea on Linux is no more difficult than installing Java. At this time, only OpenWebStart includes IcedTea so it is recommended for Windows and macOS users.

Java Installation Instructions

Instructions for installing Java on the following platforms

• Microsoft Windows
• Apple macOS
• Linux

are provide below.

Microsoft Windows Java Installation Procedures

Choose from one of the following Java distributions and follow the corresponding procedures to install it.

• OpenWebStart
  1. Download and install OpenWebStart
• AdoptOpenJDK.
  1. Download and run the Java 8 Windows installer file (msi). When choosing the installation options, select the option to have the JAVA_HOME environment variable set and to have install IcedTea.

Apple macOS Java Installation Procedures

• OpenWebStart
  1. Download and install OpenWebStart
     • Note: To launch a JNLP application, locate the .jnlp file in Finder and control-click/Open With/OpenWebStart javaws.app. OpenWebStart javaws.app may not be the default application for JNLP files.

Linux Java Installation Procedures

Choose from one of the following Java installation procedures based upon the Linux distribution you are using.

• Debian/Ubunta based distributions
  1. $ sudo apt install openjdk-11-jdk
  2. $ sudo apt install icedtea-netx
• RPM based distributions
  1. $ sudo dnf install java-11-openjdk-devel
  2. $ sudo dnf install icedtea-web