Code Name of Java Editions.

VERSION CODE NAME

JDK 1.1.4 Sparkler
JDK 1.1.5 Pumpkin
JDK 1.1.6 Abigail
JDK 1.1.7 Brutus
JDK 1.1.8 Chelsea
J2SE 1.2 Playground
J2SE 1.2.1 (none)
J2SE 1.2.2 Cricket
J2SE 1.3 Kestrel
J2SE 1.3.1 Ladybird
J2SE 1.4.0 Merlin
J2SE 1.4.1 Hopper
J2SE 1.4.2 Mantis
J2SE 5.0 (1.5) Tiger
J2SE 6.0 (1.6) Mustang
J2SE 7.0 (1.7) Dolphin (Early Access Edition is available on java.sun.com)

Notes:
Starting with Tiger, each version has two version numbers: an internal number, such as 1.5.0, and an external number, such as 5.0.

The current release is Java Platform, Standard Edition 6 (Java SE 6). The previous release was Java 2 Platform, Standard Edition 5.0 (J2SE 5.0).

Sun Microsystems simplified the platform name in 2006 to better reflect the level of maturity, stability, scalability, and security built into the Java platform. Sun dropped the "2" from the name and deleted the "dot number" (the number following the period). Any updates to Java platforms will simply be noted as updates rather than adding a "dot number" at the end of the platform name.

Due to significant popularity within the Java developer community, the development kit has reverted back to the name "JDK" from "Java 2 SDK" (or "J2SDK"). The runtime environment has reverted back to "JRE" from "J2RE." (Note that "JDK" stands for "J2SE Development Kit" in version 5.0.)

Posted by: Abhishek Chitransh (Technology Consultant).