J2SE Code Names

 

Most versions of the Java 2 Platform Standard Edition have an internal code or project name, as listed below. The dates listed are the final product release dates (following any beta releases). Feature releases are shown in bold.

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.

Since 1.2.2, major releases 1.3, 1.4.0, 5.0 and 6) are named after birds or mammals, while minor releases are named after insects, given that they are bug-fix releases. (Hopper is short for grasshopper and ladybird is another term for ladybug.)

Also see:

VERSION CODE NAME    RELEASE DATE
JDK 1.1.4 Sparkler Sept 12, 1997
JDK 1.1.5 Pumpkin Dec 3, 1997
JDK 1.1.6 Abigail April 24, 1998
JDK 1.1.7 Brutus Sept 28, 1998
JDK 1.1.8 Chelsea April 8, 1999
J2SE 1.2 Playground Dec 4, 1998
J2SE 1.2.1 (none) March 30, 1999
J2SE 1.2.2 Cricket July 8, 1999
J2SE 1.3 Kestrel May 8, 2000
J2SE 1.3.1 Ladybird May 17, 2001
J2SE 1.4.0 Merlin Feb 13, 2002
J2SE 1.4.1 Hopper Sept 16, 2002
J2SE 1.4.2 Mantis June 26, 2003
J2SE 5.0 (1.5.0) Tiger Sept 29, 2004