Differences between jdk1.1 and j2sdk1.4 (urgent please)

Someone tels me what are the main differences between jdk 1.1 and j2sdk 1.4 : packages, classes, methods, types ...please. And if there is a package that makes changes to upgrate a code written under jdk1.1 to one that operates under 1.4 or even 1.3 please tell me as quick as possible
Thanks

Yes, that might "generally" be true, but if you want a
list of incompatibilities:
Starting here
http://java.sun.com/j2se/1.4/compatibility.html#incompa
ibilities1.4 (Incompatibilities between 1.4 and 1.3)
you can trace back through the incompatibilities
between 1.3 and 1.2 and the incompatibilities between
1.2 and 1.1.Correct, but I feel pretty safe saying "generally" because of the following paragraph from the above mentioned document:
J2SE 1.4.0 is strongly compatible with previous versions of the Java 2 Platform. Almost all existing programs should run on J2SE 1.4.0 without modification. However, there are some minor potential incompatibilities with 1.3 that involve rare circumstances and "corner cases" that we are documenting here for completeness.

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while I can't tell you exclusively the differences, other than more methods have been added and some have been deprecated, from version to version, that is at least one difference.
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Message was edited by:
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<<Locked - reason: failed to search before posting question>>
Edited by: Csaba Szommer on Feb 9, 2011 9:10 AM

Hello,
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Differences between jdk1.1 and j2sdk1.4 (urgent please)

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