Re: java Lists
- From: "qubit" <lauraeaves@xxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Sat, 11 Dec 2010 19:31:20 -0600
Thanks -- one more question: Is there a short way (no looping) to
initialize a Byte[] buf with characters from a string? Can I just say buf =
"this is a test"?
Some of the methods in this package need Byte[] typed args to pass to other
methods. I need to initialize one of the buffers. No way do I want to
explode the whole string and type all the characters, and looping may be the
way I have to do it, but what a pain.
Thanks.
--le
----- Original Message -----
From: "Sina Bahram" <sbahram@xxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Saturday, December 11, 2010 6:53 PM
Subject: RE: java Lists
Two things:
Convention calls it args, not arg, just like how in c, it's called argv.
Also, no you can not, because arg is an array, and an ArrayList is an object
of type class ArrayList.
Autoboxing does exist in Java, but unfortunately, in that particular
scenario, it doesn't.
However, things like ArrayList allow you to add entire arrays worth of
contents into them, so all s not lost. Just look up the
various add methods.
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of qubit
Sent: Saturday, December 11, 2010 6:34 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: java Lists
Can you do the following? --
public static void main( String[] arg ) {
ArrayList<String> alist = arg;
}
--le
----- Original Message -----
From: "Sina Bahram" <sbahram@xxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Saturday, December 11, 2010 4:55 PM
Subject: RE: java Lists
Yes but an ArrayList is a subclass that is atually useful, and obviously if
something takes a list, it will by definition, take an
ArrayList.
Note: an ArrayList is most often preferable to a Vector
Byte[] bytes = New Byte[100];
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of qubit
Sent: Saturday, December 11, 2010 5:50 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: java Lists
Hi Sina -- I am using a list because that is what the method I am using
required.
However, now it compiles. But I am having trouble throwing together a test
for my package. How do I allocate a byte array of 100
elements? I am still thinking c and feel like I am always a little lost
climbing around the java docs.
Any enlightenment welcome. Thanks!
--le
----- Original Message -----
From: "Sina Bahram" <sbahram@xxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Saturday, December 11, 2010 12:21 PM
Subject: RE: java Lists
It's in java.util; however, I wouldn't just use List, but rather a more
specific concept.
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of qubit
Sent: Saturday, December 11, 2010 11:07 AM
To: bprogramming
Subject: java Lists
Greetings -- I am writing a java package that contains a method that has to
use class List<String>. Unfortunately, I have gone
through a few screenfulls of docs, and although I find List under
Collections, I can't figure out what to import to get the
definition of List.
I spent yesterday and today battling with java docs and while I could
continue to look for this one, I am wondering if someone could
answer it off the top of their head. I have tried importing
java.Collections, java.lang.Collections, java.aut.List (that isn't the
right def).
Any info is welcome!
TIA
--le
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