IBM® SDK, Java™ Technology Edition, Version 7 Release 1

64-bit Linux little endian (LE) user guide for IBM SDK, Java
Technology Edition, Version 7 Release 1


Supported environments
Considerations for existing Java applications
Known issues and limitations
Privacy Policy Considerations


Information about the Little Endian (LE) release of the SDK.

An LE version of IBM® SDK, Java™ Technology Edition, Version 7 Release 1 is available that runs on 64-bit Linux with Open POWER® Application Binary Interface (ABI).

You can determine whether a system is Big Endian or Little Endian by using the following system property: System.getProperty("sun.cpu.endian").

The following example shows the output from the java -version command on a LE version of the SDK:

Java(TM) SE Runtime Environment (build pxl6470_27sr1-20140401_02(SR1))
IBM J9 VM (build 2.7, JRE 1.7.0 Linux ppc64le-64 Compressed References 20140331_194701 (JIT enabled, AOT enabled)
J9VM - R27_jvm.27_20140331_2128_B194701
JIT  - tr.r13.java_20140328_60470
GC   - R27_jvm.27_20140331_2128_B194701_CMPRSS
J9CL - 20140331_194701)
JCL - 20140327_01 based on Oracle 7u55-b13


Linux architectures are identified within directory names by variables. The following table shows all the possible Linux architecture values, including the variable ppc64le for PPC 64-bit (Little Endian).

Table 1. Linux architecture values for directories
Linux architecture Value of <arch>
IA® 32-bit i386
AMD 64-bit x86_64 for install_dir and amd64 for lib_dir
PPC 32-bit ppc
PPC 64-bit (Big Endian) ppc64
PPC 64-bit (Little Endian) ppc64le
System z® 31-bit s390
System z 64-bit s390x


The installation directory is referred to as install_dir in this documentation. The default installation directory is as follows:

For example:

The Java library directory is referred to as lib_dir in this documentation. The library directory is as follows:

Supported environments

This release is supported on certain hardware platforms and operating systems.

The following hardware is supported:

The following table shows the operating systems supported for the 64-bit POWER architecture. The table also indicates the SDK service refresh (SR) level that includes support for a particular operating system:

Table 2. Linux environments tested
Hardware POWER 64-bit
Release address space 64-bit
Ubuntu 14.04 SR1

Considerations for existing Java applications

Considerations for running existing Java applications in the Little Endian (LE) Runtime Environment.

Because Java applications are typically platform-neutral, they can run on an LE Runtime Environment without modification. However, the following areas of Java code are platform-sensitive and might cause portability issues:

Known issues and limitations

Known issues or limitations that you might encounter with this release.

In this release of the SDK and Runtime Environment the following limitations apply:


This information was developed for products and services offered in the U.S.A.

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This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.

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Privacy Policy Considerations

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For more information about the use of various technologies, including cookies, for these purposes, see: (i) IBM’s Privacy Policy at ; (ii) IBM’s Online Privacy Statement at (in particular, the section entitled "Cookies, Web Beacons and Other Technologies"); and (iii) the "IBM Software Products and Software-as-a-Service Privacy Statement" at


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