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Differences between Java 1.4.2 and Java 5

Danny Fang
Greenhorn

Joined: Dec 13, 2005
Posts: 2
Hi,

I've been attempting to get information listing the differences between the Core API libraries of Java 1.4.2 and Java 5. However, majority of the sites simply list the differences/enhancements in Java 5 in terms of is functionality.

I need to know the differences between the 2 Java versions as I'm planning to sit take the SCJP exam. My 2 years background in Java is on Java 1.4.2.

Also, given that I'm from a Java 1.4.2 with no prior SCJP certification, would it be recommended for me take SCJP 5 or SCJP 6?

Appreciate any thoughts or feedbacks.

Thanks
Danny Fang.
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 41865
    
  63
I doubt that you need to know the differences between 1.4 and 5 for the exam. The objectives spell out which parts of the API are required knowledge; what does it matter whether they were introduced in Java 5 or before?


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Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14150
    
  18

Compared to Java 1.4.2, there are a lot of new features in Java 5, for example generics, autoboxing, enums, static import, etc. Some of these, such as generics, can be quite complicated, so you need time to study the new features carefully. See Java SE 5 New Features (from the JDK 5 documentation) for an overview.

The difference between Java 5 and 6 is only small. In my opinion, it's better to do SCJP 6 instead of SCJP 5 - I can't think of any reason why you wouldn't want to do the newest version of SCJP.


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