Re: Calling main() in Java??? - Java Discussion Boards

Re: Custom Design Surface (Hosting a Designer) possible

David Skelly9-Mar-10 2:04

9-Mar-10 2:04

Or you could look at the Abeille forms designer which takes a different approach to the same problem and which is also open source.

https://abeille.dev.java.net/[^]

Streaming data through Website

KenKen Wong7-Mar-10 13:11

KenKen Wong

7-Mar-10 13:11

Hi,

My coming project is to provide streaming data in stock market.
Currently, we are using request and response method in HTTP.

I read some company can provide streaming data smoothly by Java applet.
Can you have any reference or design guideline for me to implement it?

Thanks.

John

Re: Streaming data through Website

Nagy Vilmos7-Mar-10 21:47

Nagy Vilmos

7-Mar-10 21:47

Have a look at UDP, you will need to use this for the majority of your message content and then use TCP fpr handshakes and checksums.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

Re: Streaming data through Website

KenKen Wong8-Mar-10 18:50

KenKen Wong

8-Mar-10 18:50

Thanks for your idea.
However, it seems that UDP cannot guarantee the correctness of data.

Is there any standard format for data streaming?

Re: Streaming data through Website

Richard MacCutchan8-Mar-10 22:32

Richard MacCutchan

8-Mar-10 22:32

Try here[^] for explanations of what you can do with Java.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Streaming data through Website

Richard MacCutchan7-Mar-10 22:51

Richard MacCutchan

7-Mar-10 22:51

KenKen Wong wrote:
I read some company can provide streaming data smoothly by Java applet.

Well that would be a good place to ask your question, as they can probably explain what format the data comes in.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Calling main() in Java???

AmbiguousName5-Mar-10 9:12

AmbiguousName

5-Mar-10 9:12

Hello guys....have you ever thought to call main() in another mathod of the same class...let me show an example

class A {
     public static void main(String [] args) {
         some code here....     
     }

     public void someMethod() {
          here i want to call main()
     }
}

Can we do that?? Basically im trying to simulate ATM Machine on Console...and you know we need to go back to original MENU when we are done with some transaction.

Re: Calling main() in Java???

Richard MacCutchan5-Mar-10 9:49

Richard MacCutchan

5-Mar-10 9:49

This is the wrong way to do it. Use your main() method to drive the application. If you need some function to execute repeatedly then either call it (if static) direct from main, or create a new object of the class and call its method(s) within some control loop. So in your sample above main() should create a new object of class A and repeatedly call someMethod().

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Calling main() in Java???

TorstenH.7-Mar-10 22:54

TorstenH.

7-Mar-10 22:54

I would prefer to go further:

ALLWAYS create another object in your main and work from the object or deeper.

Maybe this can help you too:

recursion ^

greets
Torsten

I never finish anyth...

Re: Calling main() in Java???

Richard MacCutchan7-Mar-10 23:56

Richard MacCutchan

7-Mar-10 23:56

Thanks, I know that, perhaps you could pass your advice to the OP.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Calling main() in Java???

David Skelly7-Mar-10 22:27

David Skelly

7-Mar-10 22:27

Well, yes, you can call main because at the end of the day it is just a static method, so you can do:

A.main(args);

But as pointed out in the previous answer, why would you want to? If you find yourself doing this it almost certainly means that there is something wrong with your design.

Re: Calling main() in Java???

AmbiguousName8-Mar-10 1:36

AmbiguousName

8-Mar-10 1:36

yes...I started my problum from the scratch with better approach and it was working. So no need to call main() in another method of same class.

Command Line Interface in JAVA??

AmbiguousName4-Mar-10 5:56

AmbiguousName

4-Mar-10 5:56

Hello guys....i have a simple question.
1) How do we use Command Line Interface (CLI) for java programs...i mean we provide arguments using CLI and main() in our java class will use them according to our instructions.
2) Lets suppose that our class has 2 functions Square() and Cube() in it. Now how provide an argument using CLI to one of these functions??

thanx for ur help.....

Re: Command Line Interface in JAVA??

Richard MacCutchan4-Mar-10 21:24

Richard MacCutchan

4-Mar-10 21:24

Your Java program should contain a main function defined as:

public static void main (String argv[])

The command line parameters can then be accessed from the argv array.

As to your second question, you pass parameters to other functions in the call to the function, they do not have direct access to the command line parameters.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Command Line Interface in JAVA??

Nagy Vilmos4-Mar-10 22:16

Nagy Vilmos

4-Mar-10 22:16

Further to Richards answer, you can take arguments when you START or accept INPUT ounce running.

A long, long time ago all programs worked like this:

Loop until input is "EXIT"
  Prompt
  Get Input
  Process Input

When you process the input you'll need to tokenize what is typed and go from there. Enjoy.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

How to zip a text file in gzip format

msubbaraodba25-Feb-10 0:51

msubbaraodba

25-Feb-10 0:51

How to zip a text file in gzip format

Re: How to zip a text file in gzip format

David Skelly25-Feb-10 1:16

David Skelly

25-Feb-10 1:16

If you want to take a text file and zip it using gzip compression you can use java.util.zip.GZIPOutputStream.

There is a good overview here:

http://java.sun.com/developer/technicalArticles/Programming/compression/[^]

Vector3d with floating values.

002comp24-Feb-10 19:28

002comp

24-Feb-10 19:28

Hello Friends
I am in a very critical situation.I am having some float values and the the method I am using to scale is setScale that accepts only vector3d(int,int,int).So how can i create vector3d by using float values.Or is there any other way to create vector3d with flaoting values?

Thanks & Regards
Yogesh

Re: Vector3d with floating values.

Cedric Moonen24-Feb-10 20:32

Cedric Moonen

24-Feb-10 20:32

As usual, your question is so vague that it is almost imposible to give an accurate reply. You should really try to give much more information about the context of your question. Here, we don't have any clue what you might be talking about (unless by guessing)...
From which "library" is this vector3d class coming from ? Why are you using float values if you need to express positions in integers and not in float values ? From where are those float values coming from ? etc...

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Vector3d with floating values.(Solved)

002comp24-Feb-10 22:20

002comp

24-Feb-10 22:20

Hello Cedric
I am sorry If my questions are too much vague for you but I try my best to explain from myside.I guess you might be some senior member here so I respect you.Is that reason that some of mine last questions were not answered by anyone?

Actually,I got the answer to my question .but Anyway I will Explain you more in details.vector3d is from java3d Library.And I am getting float values some obj file format.Ans setScale is function of Transform3d.And SetScale are of types, one accepts float and other accepts vector3d.I was getting flaot values so my question was how to create a vector3d from flaot values.
But It solved After more googling.

AnyWay,I appreciate for your valuable time in my thread and even for answering to me . Rose | [Rose]

Thanks Once Again
Regards
Yogesh Sikri

Re: Vector3d with floating values.(Solved)

Nagy Vilmos25-Feb-10 1:34

Nagy Vilmos

25-Feb-10 1:34

yogeshs wrote:
But It solved After more googling

Maybe, just maybe, you should try google BEFORE cp.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

Re: Vector3d with floating values.

Arun Reginald Zaheeruddin1-Mar-10 0:11

Arun Reginald Zaheeruddin

1-Mar-10 0:11

It seems like you are trying to use a Java library for 3D programming. If that is the case, then there would most definitely be a class called FastMath in a package called math somewhere. You can use the FastMath.round(...) method within that class to convert the float values to an int without much overhead. This will enable you to then pass those values to the Vector3D class.

Hope this helps. I would have been of further help if I only knew what libraries you were using.

The beginning of knowledge is the fear of God

Java Concurrent Programming guidance

deed.indeed24-Feb-10 12:27

deed.indeed

24-Feb-10 12:27

Hi Everybody,
I am trying to search for a free source Java project or application which is currently sequential and could be converted to multithreaded code.Any suggestion on which application could be converted to concurrent Java code.

Thanks in advance for your help
Deed

Re: Java Concurrent Programming guidance

Nagy Vilmos24-Feb-10 21:57

Nagy Vilmos

24-Feb-10 21:57

Write a program that does something ten times.
Convert said program to do it once on each of ten threads.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

Re: Java Concurrent Programming guidance

deed.indeed25-Feb-10 3:46

deed.indeed

25-Feb-10 3:46

Thank you Nagy for the quick response.
I was actually looking for a bigger implementation which I could convert to concurrent code for Masters project.I am right now looking into sourceforge to see if there are any projects there..Any suggestions would be appreciated.

Thanks a lot
Deed

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