Hello,
I finally had time to go past the HelloWorldApp in the
tutorial. :D
Now I'm trying to create my own classes then run them
through my interface...
But I'm a little confused:
The HelloWorldApp had everything in it. It didn't need a
interface, why do we need to make a separate interface for all
our other classes?
Why do we have to create an interface when the class already
has the same code in it?
Do you save all classes as a .java file then use javac to
compile it into a .class file?
What do you save interfaces as?
I created a class for my heater:
/** creates the class for heater which has temperature,
speed and onOff
*/
class Heater }
int temperature = 0
int speed = 0
int turned = on
voide changeTemprature(int newValue) {
temperature = newValue;
}
voide speedUp(int increment) {
Speed = speed + increment;
}
voide slowDown(int decrement) {
Speed = speed - decrement;
}
voide turnOn() {
Turned = on;
}
voide turnOff() {
Turned = off;
}
voide printStates() }
System.out.println("temprature:"+temprature+" speed:"+speed+"
turned:"+turned);
}
}
Where do I put the lines like:
public static void main(String[] args)
and
System.out.println
?
Also do I have the right idea with the word after void is
the word I type to turnOn the heater?
And the word after (int is the word that could be what ever
I want it to be, it just needs to be the same below?)
Example:
voide slowDown(int pizza) {
Speed = speed - pizza;
}
?
If you have any question, the interface for the heater is:
interface Heater }
voide changeTemprature(int newValue);
voide speedUp(int increment);
voide slowDown(int decrement);
voide turnOn();
voide turnOff();
}
Sorry, I didn't see answers to these questions in the
tutorials and I need to know this to do anything!
Thank you,
Brandon Keith Biggs
Sent: Thursday, July 07, 2011 6:50 AM
Subject: RE: Best Java Guides for a Newby?
That’s not learning a language Ken, that’s learning an
SDK, which implies one already knows how to use the
language.
I think you should start off with text as well, so that
six months later you aren’t asking basic questions like why
doesn’t this class run, because you never had to put a mian
method in it since Eclipse always did that for you, etc.
etc.
Of course, that implies that you actually want to learn
the fundamentals of the language, and not just code.
Take care,
Sina
I have to disagree with this. There is nothing like
using eclipse when you’re learning a language. Let’s say
you are in Android and need to make an Application. Ok so
you start it up and there is an Activity class. You’re in
your text editor what do you do?
You go out on line or into a document and try to read
up on all the possible functions you can run in an
activity. Not bad but why not make it quicker.
Just arrow to your myactivity and use the source menu
and go down and select override members. Then you can arrow
through the list of things you have that you can do in that
class. You check a few and tab down and hit ok. Now you
have 6 stub functions that work perfect. You then go down
to the keydown function that you just added and arrow over
keyEvent and select help it tells you all the functions
Eclipse and Visual studio are not just environments
but they are great learning tools. Not to mention learning
the environment now with an easy program will speed up both
development of a harder program but it also teaches you how
to download other peoples projects and get them running.
Heck for that matter if you don’t use eclipse you have
to learn another way to compile your project. Which
normally means you start compiling at the command line with
javac. That sounds easy but how many of you have tried this
and ran into the java path problems. That is not something
you want to get a new user into right away. Then if you
want to get real bold and use ant as a new programmer you
better have a lot of antacid.
So I guess in short I just wanted to say sure Eclipse
is a big pig but the gains for a new coder is pretty high if
you learn to use it. Now if you’re on a Mac sorry to hear
it while I like Mac I have not been impressed with the
amount of work I had to go through to get Eclipse set up. I
use it on both Mac and Windows but I will tell you there is
nothing like Eclipse and Jaws 12. I use no scripts and do
just fine.
Ken
Hi Brandon,
This is my opinion, so take with a grain of salt. Right
at the beginning with Java, I feel that you should use a
text editor. Personally, I prefer EdSharp, but there are
lots of good ones. Learn to use the command line tools that
come with the Java Development Kit. After you have written
some programs, and you know what's going on with basic Java,
start to use something like Eclipse or Net Beans. I have no
experience with SodBeans, but I understand that that package
for NetBeans is making a big difference in NetBeans
accessibility. So scrap fancy editors for now.
Jim
Thanks and I started reading those, the only problem is I
use Eclipse and these talk about the Netbeans IDE which I
think it is inaccessible.
My big question is: What are all the differences in the
different things you can create with the new menu
in Eclipse? There are like projects, classes, Java projects
and all kinds of other things that aren't really talked
about with Java.
Sent: Wednesday, July 06,
2011 9:36 AM
Subject: RE: Best Java Guides
for a Newby?
Hi,
I think that, as with many things, this is one of those
things that can be different, depending on the learning
style and knowledge of the person.
Speaking just for myself, I get more out of tutorial
style books, when I'm learning a language. I tend to freeze
up at reference type material that is full of code and short
on words, but that's my taste.
According to me, you will probably do well with the
nutshell books, if you already know lots of programming
concepts and want to see how certain things are done in
Java. On the other hand, you may do better if you have
little programming experience by looking at the Java
Tutorial, which takes things a concept at a time and
explains them with lots of words and examples. You can see
that at
http://download.oracle.com/javase/tutorial/reallybigindex.html.
Thanks.
Jim
I would recommend if you have a subscription to
bookshare.org, that you download a copy of "Java in a
Nutshell". It is a nice summary of features with some
examples. I was going to read "Thinking in Java, 4th
edition", which I forked $25 for online, but got a package
that I cann't display on my system. I have been unable to
read more than the preface, and most the time, the html
just freezes things. So I'm pitching it. A shame as it
sounds like a useful guide to using java the way it is
meant to be used.
Good luck and happy hacking.
----- Original Message -----
Sent: Wednesday, July 06, 2011
6:44 AM
Subject: Re: Best Java Guides
for a Newby?
Hello Brandon,
Do you have any form of IM or perhaps skype? I would like
to help you but it's easier for me to recommend something
if i know a bit more about your background.
Florian
On Jul 6, 2011, at 8:04 AM, Brandon Keith (Biggs)
wrote:
I'm new to programming, (I have just made it past
"Hello World") and am looking for some guides.
I would like to learn Java, but I'm not quite sure
where to start. I downloaded the 500 or so documents
from the "Java Documentation" at:
as well as reading all the tutorials on Eclipse and
Java.
I've installed the SDK 1.6 and Eclipse, is there
anything else I need? I see there are Jaws scripts
for Eclipse, where do I insert those?
I arrowed through the 500 documents dealing with
Java and found:
Java Tutorial 3rd Edition, a short course on the
basics
but I see it was written in 2001 and only deals
with Java 1.3 and Windows 2000 and before. Is this
something I should read? What books best describe
the language in an exciting and useful format? I'm
wanting to eventually program for Android, but I
think that is stepping a little ahead of myself.
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