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Re: Hardware

Richard MacCutchan30-Sep-12 22:07

Richard MacCutchan

30-Sep-12 22:07

stib_markc wrote:
And I didn't down-vote you.

Thanks, but don't worry about it, a few downvotes never hurt anyone.

As to your main question I have not looked at the links that the other guys have offered but they may answer your query. I have worked on similar projects in the past and found the best solution was to write the low-level stuff in C/C++ and use the Java Native Interface[^] to access it from the Java application.

One of these days I'm going to think of a really clever signature.

Re: Hardware

Joan M28-Sep-12 23:57

Joan M

28-Sep-12 23:57

Richard is 100% right, meanwhile, take a look at this link: http://www.coderanch.com/t/533684/java/java/Java-access-Sound-Card[^]

Probably the 6th thread from Carl Worley will help you.

Good luck!

[www.tamautomation.com] Robots, CNC and PLC machines for grinding and polishing.

Re: Hardware

stib_markc30-Sep-12 19:39

stib_markc

30-Sep-12 19:39

Thank you, I will look into it and get back.

Re: Hardware

TorstenH.29-Sep-12 2:18

TorstenH.

29-Sep-12 2:18

Sound is a bit of a problem, most of the support has been turned down.

But yes, check this: [Java Sound API[^] @ oracle.com

regards Torsten
When I'm not working

Re: Hardware

pasztorpisti30-Sep-12 0:16

pasztorpisti

30-Sep-12 0:16

In worst case you can implement your interaction in C/C++ modules for each supported platform and you can bind your native code to java via native method calls but thats a lot of work especially if you have a lot of different platforms to support. But you can reach any platform specific functionality from java if you are willing to write some platform specific C/C++ for it. In your case I would go with the sound api the guys already linked if its enough to get the job done.

Re: Hardware

stib_markc30-Sep-12 19:49

stib_markc

30-Sep-12 19:49

Native methods in Java? I have to learn about them.

The master of the art of living makes little distinction between his work and his play, his labor and his leisure, his mind and his body, his education and his recreation, his love and his religion. He hardly knows which is which; he simply pursues his vision of excellence in whatever he does, leaving others to decide whether he is working or playing. To him he is always doing both.

Re: Hardware

pasztorpisti30-Sep-12 23:04

pasztorpisti

30-Sep-12 23:04

You can declare a static or instance method in java and by applying the native keyword on it you indicate for the compiler that you will provide the implementation with native code, and not in java. Then you have to write a DLL (or more DLLs) that exports the native function(s) with the appropriate names. When you java program starts you have to load the needed DLLs with System.LoadLibrary() before you call the native methods. Example: http://www.javaworld.com/javatips/jw-javatip23.html[^]

I would note that you should always try to write as much code in crossplatform java as you can and don't use native methods if you can avoid them because platform dependent stuff defeats the purpose of java.

soduku

Member 946247626-Sep-12 11:40

Member 9462476

26-Sep-12 11:40

hey guys,can you make an array without a length.? Big Grin | :-D

Re: soduku

mohitjain0121-Oct-12 7:23

mohitjain012

1-Oct-12 7:23

int arr[]=new int{1,2,3,4};
Big Grin | :-D

Re: syp2486

spy248614-Oct-12 17:03

spy2486

14-Oct-12 17:03

int[] array={1,2,3,4};

How to pass a value from Java Applet code to HTML page

Prathviraj08026-Sep-12 4:33

Prathviraj080

26-Sep-12 4:33

I have an application where I need to send the values from java applet code to html page. Please help me to send the values from java code to HTML page(may be using javascript)
My java code is,

Java

public class Calc extends Applet
{

	public int tot = 0;
  	public void paint(Graphics g) 
  	{
  	int M1 = Integer.parseInt(this.getParameter("m1"));
  	int M2 = Integer.parseInt(this.getParameter("m2"));
  	int M3 = Integer.parseInt(this.getParameter("m3"));
  	int M4 = Integer.parseInt(this.getParameter("m4"));
  	int M5 = Integer.parseInt(this.getParameter("m5"));
  	int M6 = Integer.parseInt(this.getParameter("m6"));
  	tot=M1+M2+M3+M4+M5+M6;
  	this.setParameter("tot",Integer.toString(tot));
  	g.drawString(Integer.toString(tot), 10, 10);
  	}
  	
}

Decoding mp3 in java

Member 945946325-Sep-12 15:54

Member 9459463

25-Sep-12 15:54

I have this very urgent requirement of developing a code that can extract .mp3 from .flv . I have had partial success in extracting raw bytes of mp3 from it . Now why is it that when i use something like

FileOutputStream fout=new FileOutputStream("dude.mp3");
     fout.write(buffer,0,len);

assuming that buffer contains all the bytes of extracted mp3 .
Can somebody perhaps give me an alternate approach which does not involve using ffmpeg . I just want to work with bytes (it's a requirement and also no external apis).

Re: Decoding mp3 in java

Richard MacCutchan25-Sep-12 22:12

Richard MacCutchan

25-Sep-12 22:12

Member 9459463 wrote:
I just want to work with bytes (it's a requirement and also no external apis).

Why start by setting restrictions rather than investigating what tools are available that may help to solve your problem?

One of these days I'm going to think of a really clever signature.

Re: Decoding mp3 in java

Member 945946325-Sep-12 22:49

Member 9459463

25-Sep-12 22:49

It's an interview question .

Linux console and web services

Member 835348724-Sep-12 22:56

Member 8353487

24-Sep-12 22:56

Hi all, I'm working on a linux machine and I'd like to show via web services architecture some informations collected via linux shell acting with command like top, or ps.
My aim is to expose via web services informations of some processes that are running on my machine and these informations are available only via shell commands.

Now: how can I do this in Java? Is Java yhe best choice?
Any advice?

Thank you all,

Pietro

Re: Linux console and web services

jschell25-Sep-12 8:37

jschell

25-Sep-12 8:37

1. Learn how to act as a client (in a client/server setup) to get to a web service.
2. Get the information out of the returned web service call.
3. Learn how to code console output.
4. Use 3 to print the information from 2.

begin java

uttam kukadiya22-Sep-12 10:00

uttam kukadiya

22-Sep-12 10:00

how can i begin with java language??
what java software i needed??
which source is best for self-learning??

Cross post

Wes Aday22-Sep-12 10:21

Wes Aday

22-Sep-12 10:21

You have already asked this in QA

Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Please stand in front of my pistol, smile and wait for the flash - JSOP 2012

Re: begin java

ravi kumbhkar23-Sep-12 20:12

ravi kumbhkar

23-Sep-12 20:12

to begin with java, if u know c++ is better , but if u don't know c++. u can also learn java. u should first go through java book that is "E.balaguruswamy".

u need jdk1.5/1.7.

internet is the best source to learn self....

Re: begin java

Amarnath S24-Sep-12 5:48

Amarnath S

24-Sep-12 5:48

A very good way to learn Java is the free course from Stanford Engineering Everywhere:
Programming Abstractions[^]

The instructor Mehram Sahami is simply great!

Re: begin java

April Fans22-Dec-12 21:26

April Fans

22-Dec-12 21:26

Hello Uttam Kukadiya,

First you need to learn the basics of the language.. There are many of tutorials available but you might like to take a look at this online resource:

http://www.functionx.com/java/index.htm

There is also the offical site:

http://docs.oracle.com/javase/tutorial/

The most important aspect when learning how to code in a programming language easily, quickly and effectively is writing the code YOURSELF, testing it and just play around with it by experimenting with changing the values and amongst other things. Smile | :)