Java Versions & Code Names


Java  Versions & Code Names
Most versions of the Java 2 Platform Standard Edition have an internal code or project name.
 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.)
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


Reference:Oracle 

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