J9 is a Java Virtual Machine

Java Virtual Machine

A Java virtual machine is a virtual machine capable of executing Java bytecode. It is the code execution component of the Java software platform. Sun Microsystems stated that there are over 4.5 billion JVM-enabled devices.-Overview:...

 developed by IBM

IBM

International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

. The J9 VM is the basis of multiple IBM Java offerings, including WebSphere Micro Edition

IBM WebSphere

IBM WebSphere refers to a brand of computer software products in the genre of enterprise software known as "application and integration middleware". These software products are used by end-users to create applications and integrate applications with other applications...

, as well as the basis of all IBM Java Development kits since version 5. IBM has also made the J9 VM available to the Apache Harmony

Apache Harmony

Apache Harmony was an open source, free Java implementation, developed by the Apache Software Foundation. It was announced in early May 2005 and on October 25, 2006, the Board of Directors voted to make Apache Harmony a top-level project...

 project for use in running their class libraries.

The design of the J9 VM has been aimed at portability to different platforms, as well as scaling from mobile phones all the way to zSeries mainframes.

External links

• http://wiki.eclipse.org/index.php/J9
• http://abstract.cs.washington.edu/wiki/index.php/UbiComp:Hacking:Java:J9
• http://www.ibm.com/developerworks/java/jdk/linux/download.html