Questions on JAVA

[Ravi]

Dear Colleagues,

I have a few questions on JAVA, which I would be MOST grateful if any of
you could answer. Specifically, these concern moving C/C++ code to JAVA.


1. What are the JAVA equivalents of C++ language's:

a. virtual/pure virtual functions.

b. default argument functions,

c. Formatted I/O, eg. {printf ("%40", ix)
Cout<<manipulators<<ix}

d. copy constructors,

e. sizeof() --- I do not detect a sizeof)) in JAVA !. Is there any reason
for this ?.

Could you please also provide a simple example concerning the migration !.

2. What is a "javap" class file disassembler ?.
3. What is the JAVA equivalent of "closer()" ?

Many thanks for your time and patience, and I look foprward to hearing from
you in the near future.

Sincerely yours

Ravi Venkatesan

[Paul Clapham]

a. All Java methods are virtual.

b. Here's an example of how you do default arguments:

public void update(int x) {
// do something using x here...
}
public void update() {
this.update(0); // default value is zero
}

e. Java doesn't have sizeof() because it's none of your business. (I.e.
there's no way for you to use this information in Java.)

Ravi <r_c_v@vsnl.com> wrote in message news:38d4f0a4$1@news.devx.com...
>
> Dear Colleagues,
>
> I have a few questions on JAVA, which I would be MOST grateful if any of
> you could answer. Specifically, these concern moving C/C++ code to JAVA.
>
>
> 1. What are the JAVA equivalents of C++ language's:
>
> a. virtual/pure virtual functions.
>
> b. default argument functions,
>
> c. Formatted I/O, eg. {printf ("%40", ix)
> Cout<<manipulators<<ix}
>
> d. copy constructors,
>
> e. sizeof() --- I do not detect a sizeof)) in JAVA !. Is there any
reason
> for this ?.
>
> Could you please also provide a simple example concerning the migration !.
>
> 2. What is a "javap" class file disassembler ?.
> 3. What is the JAVA equivalent of "closer()" ?
>
> Many thanks for your time and patience, and I look foprward to hearing
from
> you in the near future.
>
> Sincerely yours
>
> Ravi Venkatesan