Executing external program in java and passing commands

Question

I have this chess engine Rybka.exe, that i have to execute in java Here is an example how you run Rybka: Once you clicked on it, console opens and waits for input. So then you enter "uci" and you press enter and you wait for it to load (approx. 1 sec) and then you have to enter a few more lines as options and stuff. The problem is that I don't know how to pass those commands from java to Rybka. The fact is that those commands need to be entered one at a time, because you have to wait for some to execute. This is how I tried to open it. Code:

Process p1 = Runtime.getRuntime().exec("Rybka.exe");

This works, because you can see that Rybka.exe is active in task manager, but I don't know how to pass commands to it.

Possible duplicate of Java Programming: call an exe from Java and passing parameters — jww
– jww, Commented Aug 24, 2018 at 12:44

Community · Accepted Answer · 2017-05-23 12:20:15Z

0

a) how to bind a windows console application with java application?

link provided by the courtesy of Google search query:

https://www.google.pl/search?q=java+binding+console+to+an+app&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

b) in short:

 InputStream is = p1.getInputStream();
 OutputStream os = p1.getOutputStream();

(supplied by the obvious http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/Process.html)

edited May 23, 2017 at 12:20

CommunityBot

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answered Mar 31, 2012 at 18:58

user719662

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2 Comments

user719662 Over a year ago

Note: rybka (as all UCI/WinBoard engines) does distinguish parameters (used for setting the engine's state at run time) from commands (passed to the running engine); see en.wikipedia.org/wiki/Universal_Chess_Interface and wbec-ridderkerk.nl/html/UCIProtocol.html (result of ~5 seconds of googling)

user1189571 Over a year ago

I can't believe I was so blind. Thanks for making me see it again and get it. I used input to print the output of console, but I never thought about doing it reverse.

Pramod · Accepted Answer · 2012-03-31 18:48:06Z

0

Have you tried passing parameters/commands as below?

Runtime.getRuntime().exec("Rybka.exe parameter1,parameter2");

answered Mar 31, 2012 at 18:48

Pramod

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1 Comment

user1189571 Over a year ago

I did, but first it executes to fast, problably because it just executes Rybka.exe and secondly it doesn't give any output. I know that I created ouput ok, because if I execute something else that doens't need parameters works ok.

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