raja kanak

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Recent posts by raja kanak

web page

Check the above url which gives details about K&B Book available in India.

Good luck
A sub-question

int[][] a = {{1,2,}, {3,4}};
After the above code, a is a two dimensional array and a[0], a[1] are one dimensional arrays. Am i right?

If I am right, is the cast necessary in the following line?
int[] b = (int[]) a[1];
Code is from javabeat

In the above code, if i uncomment //1 then it is compilier error. My doubt is, we can add anything into s (set of Objects), then why can't hs? (HashSet is subclass of Object)
Oops. You are right. Now I am clear. Thanks friends.
K&B Chapter 7: Generics and Collections, page number 594 says


public void AddAnimal(List<? super Dog> animals) is essentially, "Hey compiler, please accept any List with a generic type that is of type Dog, or a supertype of Dog. Nothing lower in the inheritance tree can come in , but anything higher than Dog is OK."



Im confused Can any body throw some light on this?

The above code breaks at //1
Object is super class of String, then why it is not compiling?
[ March 16, 2007: Message edited by: raja kanak ]

Thanks ShivKumar for your reply. As per your suggestion I modified my code as at //0 final int a; and at //1 included a=5 which gives compile time error "Cannot assign a value to final variable". So i commented //1 and again it complains that "variable a might not have been intialized".

That means we must initialize the variable a before the MethodLocalClass definition.

Again at //0 i removed final modifier, then the compiler error is "local variable a is accessed from within inner class; needs to be declared final"

Conclusion: To access a local variable inside inner class, that variable should be declared final as well as it should be initialized outside the inner class.

Please correct me, if I am wrong.

raja

Originally posted by Jesse Custer:
You are reassigning a final variable. You cannot give 'a' a new value.



I changed //1 as
System.out.println(a);

Still it is problem, "Identifier expected".

The code compiles
How can we use this interface & what is use of it?
(I feel it is silly question)

The above code shows error at //1 while compiling. I thought since a is declared as final, it can be used inside MethodLocalClass. But what went wrong?

Originally posted by Barry Gaunt:
Did anyone actually receive anything? If no answer, then we'd better close this thread. Nice collection of e-mails here for the spam crawlers to find.



You are right.

Hope the code above will help.