Collection Generics SCJP 6.0

[Rafi Fareen]

Hi guys,

I was reading this topic, generic mixed up with non-generics.

List<Integer> table = new ArrayList<Integer>();
for(int x=0;x<5;x++)
table.add(x); // autoboxing is done automatically

int y = table.get(3); //unboxing and cast is done automatically.



in case i change the List declaration to non-generic, than


List table = new ArrayList();
for(int x=0; x < 5; x++)
table.add(x); // it should work, i mean automatically autoboxing it

int y = (Integer) table.get(3); // i'm doing the casting, but what about the unboxing, is it done automatically???


finding these topics interesting, but isn't this Collection chapter very vast in this bert bates and siera book ??? i mean if any topic is being eliminated from the exam objective (like serialization .... ) ....

thanks guys, hoping that i be able to appear for exam by 10 or maximum 15th of feb 2010.

regards,

Rafi

[Deepak Bala]

Please post code inside CODE tags

table.add(x); // it should work, i mean automatically autoboxing it

It would not because collections that do not use generics will default to storing objects. An int cannot be boxed to an Object