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The following is the latest on content, availability and service levels:
This product is the z/OS 64-bit Java product that supplies the Java 1.4.2 APIs. It became generally available in September, 2004 and is periodically updated with cumulative service and improvements. However, there is now a later and better z/OS Java 64-bit product; if you are considering a 64-bit SDK product we strongly recommend IBM 64-bit SDK for z/OS Java 2 Technology Edition, V5.
Note: This product is no longer marketed as of September 5, 2007. The end of service has been announced for September 30, 2008. For more information, see product support.
The IBM 64-Bit SDK for z/OS, Java 2 Technology Edition, V1.4 requires either:
- z/OS Version 1 Release 6 or higher
- z/OS.e Version 1 Release 6 or higher
For more product details, read the formal announcement.
Compatibility:
IBM 64-Bit SDK for z/OS, Java 2 Technology Edition, V1.4 (5655-M30) has the same functions as IBM SDK for z/OS, Java 2 Technology Edition (5655-I56), V1.4 with the exception of:
- Persistent reusable function
- Sharing class objects between Java virtual machine (JVM) processes running in the same address space
64-Bit SDK for z/OS, Java 2 Technology Edition, V1.4 (5655-M30) and SDK for z/OS, Java 2 Technology Edition, V1.4 (5655-I56) are independent products and can co-exist on the same z/OS system.
Most Java applications executed on Java for OS/390 (5655-D35) should run on IBM 64-Bit SDK for z/OS, Java 2 Technology Edition, V1.4 unchanged provided they do not use deprecated Java 2 SDK 1.3 APIs. Additionally, in some cases because of some small number of incompatibilities introduced industry-wide between Java 2 SDK 1.3 and SDK 1.4 APIs, some applications may have to change. Details on these incompatibilities are available at the Sun web site.
IBM 64-Bit SDK for z/OS, Java 2 Technology Edition, V1.4 takes advantage of enhanced z/OS linkage capabilities (XPLINK.) The z/OS operating system provides an XPLINK runtime environment for all 64-bit programs, including the JVM. This contrasts with the 31-bit Java product, IBM SDK for z/OS, Java 2 Technology Edition, V1.4 (5655-I56), where it is necessary to ensure that an XPLINK environment is in place when the JVM is launched.
Programs interacting with the 64-bit Java product, whether launching the JVM or being called from the JVM through the JNI interface, must be 64-bit programs. Programs dependent on JNI interfaces may require changes at the interface boundary to conform to 64-bit data types. Application JNI routines written in C will need to be recompiled for 64-bit, which may require some code changes.

Product Content
The IBM 64-Bit SDK for z/OS, V1.4 provides a full function SDK compliant with the SDK1.4.2 APIs.
Documentation is available for content that is additional to the base.
All content above is shipped with the z/OS SDK product and is zAAP eligible.
If you are migrating from Java 2 Technology Edition, SDK1.3.1, to IBM 64-Bit SDK for z/OS, see:
If you are migrating from Java 2 Technology Edition, SDK1.3.1 or 31-Bit SDK1.4 product, see: Porting Guide.
For additional Hints and Tips see: IBM 64-Bit SDK for z/OS, Java 2 Technology Edition, Version 1.4 SDK and Runtime Environment User's Guide.

Getting the Product
Note: The SUN SDK level is SDK 1.4.2. SUN SDK levels corresponding to previous PTFs, including availability from this website, are in the service summary.
Before installing the code be sure to check the following links:
The non-SMP/E installable format of the code is available only from the web.
Be sure to read additional install information prior to download and install. Check here also after you download and install the code to verify the install.
Download the non-SMP/E format of the code.
The SMP/E installable format of the code is available only through ServerPac or CBPDO.
Order IBM 64-Bit SDK for z/OS through a z/OS ServerPac or CBPDO, which can be ordered through the Internet (where available) or through the traditional ordering process.
When ordering:
- The product number is 5655-M30
- The subscription and service number is 5655-I48
ShopzSeries (formerly SHOPS390) provides an easy way to plan and order your IBM SDK for z/OS with your z/OS ServerPac or CBPDO. It will analyze your current installation, determine the correct product migration, and present your new configuration based on z/OS. Additional products can also be added to your order (including determination of whether all product requisites are satisfied).
ShopzSeries is available in the U.S. and several countries in Europe. In countries where ShopzSeries is not available yet, contact your IBM representative (or Business Partner) to handle your order via the traditional IBM ordering process.
For more details and availability, visit the ShopzSeries Web site.
Be sure to read the Program Directory:

Product History
A brief history of the updates will be kept in this location.
The topmost entries correspond to the code that can be ordered or downloaded from this Web site.
The Service summary contains the following information:
- PTF numbers and their build dates
- related APARs and updated classes
- corresponding SUN SDK levels
- where the service can be obtained (Web or order the tape from IBM)
- whether the SDK level is currently supported
- clarification of our PTF/APAR processing
May, 2008 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK36704 (APAR: PK60864). The build date of the code is:
- May 17, 2008 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
February, 2008 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK33382 (APAR: PK49710). The build date of the code is:
- January 22, 2008 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
July, 2007 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK27003 (APAR: PK42533). The build date of the code is:
- July 8, 2007 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
April, 2007 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK23602 (APAR: PK40163). The build date of the code is:
- March 29, 2007 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
December, 2006 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK20278 (APAR: PK35600). The build date of the code is:
- November 24, 2006 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
August, 2006 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK17574 (APAR: PK30505). The build date of the code is:
- August 24, 2006 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
April, 2006 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK13892. The build date of the code is:
- April 21, 2006 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
January, 2006 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK11177. The build date of the code is:
- January 20, 2006 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
September, 2005 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK07862. The build date of the code is:
- September 29, 2005 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
June, 2005 Maintenance Rollup
A PTF for SDK 1.4.2 is available that upgrades the product to the latest service levels and provides a full function SDK compliant with the SDK1.4.2 APIs.
PTF number: UK05194. The build date of the code is:
- June 9, 2005 for:
- z/OS V1.6 or higher
- z/OS.e V1.6 or higher
December, 2004 - General Availability
SMP/E code is available corresponding to non-SMP/E code. September, 2004 - General Availability
Non-SMP/E code is available.
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