Does the first enumerator have default value of 0 like in C++?

[Thomas Hawtin]

In C++, by default, the first enumerator has a value of 0, and each
successive enumerator is one larger than the value of the previous one,
unless you explicitly specify a value for a particular enumerator.

What about in Java ( JDK 5.0)? Can I assign a value to the particular
enumerator?
I have googled for it and found nothing. Does anyone know?

http://download.java.net/jdk6/docs/api/java/lang/Enum.html#ordinal()

You can also, of course, add methods to your enum to return whatever
value you like.

Tom Hawtin

 

[iherage]

In C++, by default, the first enumerator has a value of 0, and each
successive enumerator is one larger than the value of the previous one,
unless you explicitly specify a value for a particular enumerator.

What about in Java ( JDK 5.0)? Can I assign a value to the particular
enumerator?
I have googled for it and found nothing. Does anyone know?
Thank you.

 

[Chris Uppal]

http://download.java.net/jdk6/docs/api/java/lang/Enum.html#ordinal()

And pay particular attention to the sentence:

"Most programmers will have no use for this method."

-- chris

 

[dingbat]

In C++, by default, the first enumerator has a value of 0, and each
successive enumerator is one larger than the value of the previous one,
unless you explicitly specify a value for a particular enumerator.

What about in Java ( JDK 5.0)?

Simple. You write code like that in my projects and I'll break your
fingers.

 

[Jeffrey Schwab]

Simple. You write code like that in my projects and I'll break your
fingers.

Seems a little harsh. Problems at home?

Seriously, you have a beef with sequences of named, consecutive integers?

 

[Chris Uppal]

Seriously, you have a beef with sequences of named, consecutive integers?

I doubt it, but where is the connection between integers and instances of
(subtypes of) java.lang.Enum ?

Unlike the case in C and C++, Java's enums are not fancy syntax for a list of
integers -- they are /objects/. They can have integers /associated/ with them,
sure. And floats. And Strings...

I suspect the OP hasn't realised this, and that dingbat's post was a gentle
hint to the same effect ;-)

-- chris

 

[Jeffrey Schwab]

I doubt it, but where is the connection between integers and instances of
(subtypes of) java.lang.Enum ?

Unlike the case in C and C++, Java's enums are not fancy syntax for a list of
integers -- they are /objects/. They can have integers /associated/ with them,
sure. And floats. And Strings...

I suspect the OP hasn't realised this, and that dingbat's post was a gentle
hint to the same effect ;-)

That makes sense. It also explains the exasperation. Thanks.

I have not had much occasion to use Java Enums yet, but they do look
promising. Just for the record, though:

- C++ enums are first-class types. They're not just integers.
This is in contrast to C.

- Mr. Bat's issue may have been with the implicit default value
of zero. It seems appropriate, though, since several other
Java types' default values are also zero.

 

[Roedy Green]

What about in Java ( JDK 5.0)? Can I assign a value to the particular
enumerator?
I have googled for it and found nothing. Does anyone know?
Thank you.

A Java automatically assigns integers starting at 0. You of course are
free to invent some other method of your own that assigns something
else, e.g. a non-consecutive it, a char, a short string, a
description...

See http://mindprod.com/jgloss/enum.html