Structs / Records in Java

[Rick]

Hi,

We all know that Java has classes but how about basic storage objects like
structs? C and C++ have Structs, Pascal has Records, Visual Basic has Types
etc. How about Java?

Greetings,
Rick

[Jonas Kongslund]

Re: Structs / Records in Java

Rick wrote:
[color=blue]
> Hi,
>
> We all know that Java has classes but how about basic storage objects like
> structs? C and C++ have Structs, Pascal has Records, Visual Basic has
> Types etc. How about Java?[/color]

Java does not support structs and records. Use classes instead.

--
Jonas Kongslund

[Rick]

Re: Structs / Records in Java

Ok, thats clear. Thanks!

Rick

[Stewart Gordon]

Re: Structs / Records in Java



While it was 3/11/03 10:10 am throughout the UK, Jonas Kongslund
sprinkled little black dots on a white screen, and they fell thus:

<snip>[color=blue]
> Java does not support structs and records.[/color]
<snip>

Yes it does. It just calls them classes, and greatly expands upon their
functionality.

Even in C++, a struct _is_ a class. There, the struct keyword just
serves for backward compatibility and/or syntactic sugar depending on
your point of view.

Stewart.

--
My e-mail is valid but not my primary mailbox. Please keep replies on
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[Amey Samant]

Re: Structs / Records in Java

"Rick" <aso3rick@hotma il.com> wrote in message news:<3fa629f6$ 0$58706$e4fe514 c@news.xs4all.n l>...[color=blue]
> Ok, thats clear. Thanks!
>
> Rick[/color]

hey
structs in C++ are just classes with default access specifier as
public (otherwise there is no differnec in class in C++ & a struct in
C++)
thus if you need to store only data, java does not force you to have
methods in class
for eg-: while creating data structures you can create class for Node
class Node
{
int data;
Node next;
}
this is equivalent to structs .... isnt it ?

regards
amey

[Kenneth Rose]

Re: Structs / Records in Java

Amey Samant wrote:[color=blue]
> class Node
> {
> int data;
> Node next;
> }
> this is equivalent to structs .... isnt it ?[/color]

Nope... default access for instance variables is protected, not public.
Should be:

class Node
{
public int data;
public Node next;
}

/<en

[Rick]

Re: Structs / Records in Java

I'm not 100 % sure but I don't think you may say a struct is the same as a
class. Of course, they both can be used for storing data. Classes are some
sort of advanced struct types, based on structs (since OOP languages like
Java and C++ languages came after non-object-orientated languages like C
which already had structs that time). So, they won't differ that much but
it's the same as :
"A lion is a beast but a beast is not a lion." (what a stupid example :| ).

It doesn't matter really much, I can live with the Java classes, but I was
just curious. Or maybe I was lazy because using structs if a little bit
simpler because you don't have to create them like classes.

Greetings,
Rick

[Amey Samant]

Re: Structs / Records in Java

Stewart Gordon <smjg_1998@yaho o.com> wrote in message news:<bo5v2v$1c i$1@sun-cc204.lut.ac.uk >...

hi stewart
[color=blue]
> Even in C++, a struct _is_ a class.
> There, the struct keyword just
> serves for backward compatibility and/or syntactic sugar depending on
> your point of view.[/color]

no structs in C++ are different than class (the only difference is in
class by default access specifier is private whereas in structs it is
public)
otherwise they are same
regards
amey

[Stewart Gordon]

OT: Structs / classes in C++ (was: Structs / Records in Java)



While it was 4/11/03 10:01 am throughout the UK, Amey Samant sprinkled
little black dots on a white screen, and they fell thus:

<snip>[color=blue]
> no structs in C++ are different than class (the only difference is in
> class by default access specifier is private whereas in structs it is
> public)[/color]
<snip>

I didn't say that the C++ keywords 'struct' and 'class' were synonyms.
I merely meant that by defining a struct, you are defining a class, and
it just saves having to put public: at the top.

Although it isn't enforced by the language, it remains common practice
(IINM) to use 'struct' for C-style structs, and 'class' when you want to
use the functionality of a class.

Basically,

struct Qwert {

means exactly the same as

class Qwert {
public:

and would compile to precisely the same.

Stewart.

--
My e-mail is valid but not my primary mailbox. Please keep replies on
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