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Java <-> Other Program Communication

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Posts: 103
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Hello, today I was really wondering, is this possible to "communicate" java program with other programs (lets say for example Messenger or something else)

Lets say, simple example.

- Simple java GUI aplication with text field
- Windows Live Messenger

And now lets say someone will change his status at MSN to "available" and java program will print in text field "someone changed status"

My friend told me that, such communication with another program is possible, he told me that I need proper "protocol"

Ok, Im also Gadu-Gadu user (it is polish communicator) I found protocol of this program when someone will send messageto us:

#define GG_RECV_MSG80 0x002e

struct gg_recv_msg80 {
int sender; /* numer nadawcy */
int seq; /* numer sekwencyjny */
int time; /* czas nadania */
int class; /* klasa wiadomości */
int offset_plain; /* położenie treści czystym tekstem */
int offset_attributes; /* położenie atrybutów */
char html_message[]; /* treść w formacie HTML (zakończona \0) */
char plain_message[]; /* treść czystym tekstem (zakończona \0) */
char attributes[]; /* atrybuty wiadomości */

And now Im wondering how can i use something like this in my test java application.

Thanks in advance for any help.
Posts: 9
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Hi Mathew,

Well, it is possible for other program communication using java. But the thing is that the other application should be developed, such as to accept or provide replies to your java program. For example, If you take microsoft word, you can manipulate certain things automatically, using COM. Microsoft had developed it in such a way so that programmers can use it. I am not aware of msn messenger. You better check out the documentation of the application that you are going to communicate.

If an application accepts input from stdin and gives output through stdoutput, then you can use the Process and Runtime classes to create a process and then using the getInputStream() and getOutputStream() methods, you can communicate with the process.

Hope this helps.

Posts: 6
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Hi Mathew,

probably Microsoft would like developers to communicate with their servers directly instead of communicating with the app.
If you google it you'll see there is an API available.

I am not familiar with it. They say it contains a JavaScript API (perhaps only that?). Using that you can possibly build some level of integration let's say into your JSP pages.

Hope this helps.

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