What should Java programmer learn?

Posted by Dieter on Stack Overflow See other posts from Stack Overflow or by Dieter
Published on 2010-03-30T23:32:42Z Indexed on 2010/03/30 23:43 UTC
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Hi, I code only for 3 years now, I came thru C/C++, Delphi, SQL, VBA but I mostly code in Java.

I do 90% GUIs, atm with Java swing. But time changes, so I have few questions :

Should I switch to web development from GUIs? If GUIs, is C# and WPF suitable ?
Should I learn .NET (C#,asp.net) or continue with Java (learn Spring, hibernate, JSP, JSF, JPA) ?
What is faster to learn? Finish Java or start .NET
Should I really consider using something other than Java/.NET ? Think of job opportunities.

Thanx

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