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JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
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Generics

sumi selva
Greenhorn

Joined: Jul 10, 2007
Posts: 19
Hi All,

I'm currently preparing for scjp1.5
I have read the Generics section from K&B book and from few other sites.
But still i'm not very clear about the concepts in generics.I'm plannin to take the exam by july last week.so it would be great if i get the notes highlighting the important concepts like usage of
1. < ? extends String>
2. < ? super String>
3. <?>
4. <String>
5. <T>
6. <T extends String> likewise
I have mentioned String class just for example. I just want to know the exact usages of these and how to use them and when to use them.

Thanks in advance,
Sumi
Manfred Klug
Ranch Hand

Joined: Jun 04, 2007
Posts: 377
Hi sumi,

the Java Generics FAQ may be helpful.
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
 
subject: Generics
 
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