Data exchange between Java and non-java apps

Posted on 1998-07-27
Medium Priority
Last Modified: 2010-05-18

I have an application not-written in Java (can be c, c++ or something else)  I need to create a Java applet (or application if it's impossible with an applet) that will request username/password from the user.  The java app will be called by the non-java application (they're both on the same machine).  Once the user entered his data, they need to be passed back to the calling app, and that's where i'm stuck.  I'd rather not use a socket, nor a temp file or native code.  I thought a pipe stream would be the answer, but then, how to bind the ends of the stream?  
Question by:asavard
  • 2
  • 2

Expert Comment

ID: 1228410
If I correctly understand your needs (which I'm not sure that I
do), you could use the standard out of the java application as
trapped by your non-java implementation. Quick example:

public class Foo
    public static void main( String args[] )
        System.out.println( "LOGIN" );
        System.out.println( "PASSWORD" );

.called by a shell script...

echo Here is some output `java Foo` that you can use

yields the following:

Here is some output LOGIN PASSWORD that you can use

Have I oversimplified your problem?

Author Comment

ID: 1228411
You did oversimplified it.  I'll try to make myself clearer (being a french Canadian gives me trouble when trying to explain things that I don't really understand myself!!)

First of all, I need to use the awt package.  So a call to the shell won't work I think.  I'd use two edit boxes to get the information, and upon a click to OK, data will be sent back to the calling application (which is a graphic interfaced one too).  So, the problem remains to establish a connection between the two apps to do the data exchange.  What i'm trying to do is create a kind of piped stream, but for apps in two different langages.

For now, the only solution I've found is to make data exchange through the clipboard.  (It works, but I could use better security.


Accepted Solution

mjenkins earned 270 total points
ID: 1228412
I'm sorry, I think you misunderstood me. It is irrelevent as to
whether or not either application is GUI based. The point is to
pipe the standard output stream of the java app to the non-java
app. Sure pop up your dialog box. But after OK is pushed, write
the data to standard out ( System.out.println() ) and read it in
to the calling application.

Author Comment

ID: 1228413
Well, it seems that this is something that could be done.  I'll try it.  Thanks for your answer.  (I still like my clipboard solution).

To read from Stdin in C, how could it be done.  (I don't want data to be printed out on screen)


Featured Post

Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

597 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question