The documentation of each JDK release contains a page called something like "New Features and Enhancements", which lists the changes from the previous release. You can find links to the documentation of the various releases on this page.
Joined: Apr 27, 2007
thanks for your valuable info....
but it will be very helpful if you give some more info.. i not sure about the first release of jdk.... may jdk1.0 .. and each and every release will have its updated release like jdk1.0.1 ..
ok here updated release is not an issue.. i want to know the difference in packages in each and every new release... what package is added new and like jdk1.0 jdk1.1 jdk1.2 and i don't know from which release jdk became j2sdk... please specify that also and j2sdk1.3 j2sdk1.4 j2sdk.5 j2sdk6 so please
Joined: Mar 22, 2005
If you are interested in when a particular class was added to the JDK, check its javadoc - each javadoc page tells you the JDK version in which it was introduced.
Dot releases (e.g. 1.4.2) do not have any API changes over the respective base release (e.g. 1.4.0).
I don't think the documentation for old JDKs is still online, but can you download them from the archive area.
J2SDK is the same as JDK, starting with Java 1.2 (a.k.a. Java 2). [ May 04, 2007: Message edited by: Ulf Dittmer ]