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difference between jdk1.4 and jdk1.5 and jesdk1.5  RSS feed

 
Mritunjay kumar
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Here i m mritunjay,i want to know this problems.
 
Ulf Dittmer
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Welcome to JavaRanch.

I'm not sure what the question has to do with performance, but all JDK docs have a page that lists the enhancements over the previous version; the one for JDK 1.5/5.0 is here.

J2EE has a number of additional APIs that are not part of J2SE, and which are primarily targeted at enterprise use. A good place to start reading up on that is the J2EE home page.
 
It is sorta covered in the JavaRanch Style Guide.
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