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Oracle Java SE Embedded 8

Thank you for choosing Oracle Java SE Embedded 8 for your embedded system. Oracle Java SE Embedded 8 is based on the Java Runtime Environment (JRE) and provides specific features and support for embedded systems.

This document provides details about Oracle Java SE Embedded 8. The Java Runtime Environment contains the Java virtual machine, runtime class libraries, and Java application launcher, which are necessary to run programs written in the Java programming language. It is not a development environment and does not contain development tools such as compilers or debuggers. For development tools, see theJava Development Kit (JDK) Tools and Utilities documentation.

Other documentation for Oracle Java SE Embedded 8:

• Index page for Oracle Java SE Embedded 8 documentation
• Oracle Java SE Embedded 8 Release Notes

See also theJDK 8 Release Notes for release information on the JDK 8 platform.

Installation Notes

Before you install, make sure the following is true:

• You have installed a supported version of the Java SE Development Kit (JDK) or the Java Runtime Environment (JRE).
• The JDK or JRE directory is searched before any other Java installation on the host. You can use thePATH environment variable or another method, such as a symbolic link.
• TheJAVA_HOME environment variable names the same JDK or JRE directory.

The Oracle Java SE Embedded technology can be installed as follows.

1. On your host computer, download the Oracle Java SE Embedded bundle fromhttp://www.oracle.com/java/technologies/javase-embedded-downloads.html.
2. Extract the bundle from the tar file. The following example assumes the bundle was downloaded to thedownload directory.

   $ cd download$ gunzip *.gz$ tar -xvf *.tar

   The directory ejdk1.8.0 will be created in your current directory.

3. Set theEJDK_HOME environment variable todownload/ejdk1.8.0.
4. Verify the installation by displaying the help for thejrecreate command:

   $ cd $EJDK_HOME$ bin/jrecreate.sh -–helpUsage: jrecreate --help | --dest [options]where options include:...

5. Usejrecreate to create a custom version of the JRE that will suit your device and applications, then copy the JRE to the embedded device.

Platform Support

This release of Oracle Java SE Embedded 8 was tested on Linux for ARM, Power Architecture and x86 systems. The requirements of these systems are specified atOracle Java SE Embedded System Requirements. For ARM, testing was done on the v5, v6 and v7 architectures. Power Architecture systems based on e600 core and e500v2 core architectures were tested. Headless mode was tested on all systems; headful mode was tested on ARMv7.

Some of the information in this document describes support or issues concerning graphics, window managers, audio, and so forth, and therefore only applies to the headful release on ARMv7.

Java support on ARM is specific to the GNOME Desktop Environment version 1:2.30+7.

Contact Us

For Java SE Embedded product inquiries, please contact theJava SE Embedded team.