Execute commands in cmd using Java

Question

I am using the following code to run the cmd.exe and the cmd window appears which is fine.

Runtime runtime = Runtime.getRuntime();
    try {
        Process p = runtime.exec("cmd.exe /c start");
    } catch (IOException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    }

image 1

My question is that how can I run the following command on the cmd before it appears using java

ghci test.hs

my target is to make the command line looks like the following image once it appears

imag2

Do you need the cmd for path or something? You could call the ghci.exe or ghci.com directly with params I guess? — Daniel Persson
– Daniel Persson, Commented Dec 12, 2015 at 11:37
@DanielPersson I tried to call ghci earlier it works, however the cmd window does not appear. — Haskell00
– Haskell00, Commented Dec 12, 2015 at 11:42
@DanielPersson yes exactly and appear the command line window image number 2 — Haskell00
– Haskell00, Commented Dec 12, 2015 at 11:53

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

2

run

Runtime runtime = Runtime.getRuntime();      
try { 
    Process p = runtime.exec("start cmd.exe /k \"ghci.exe test.hs\""); 

} catch (IOException ex) {
 Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); 
}

referens http://ss64.com/nt/cmd.html

more info at How to open the command prompt and insert commands using Java?

edited May 23, 2017 at 12:23

CommunityBot

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answered Dec 12, 2015 at 11:44

Daniel Persson

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4 Comments

Daniel Persson Over a year ago

try adding start before cmd

Haskell00 Over a year ago

adding start caused this error : Dec 12, 2015 3:16:20 PM ui.Main Programmar1ActionPerformed SEVERE: null java.io.IOException: Cannot run program "start": CreateProcess error=2, The system cannot find the file specified

Daniel Persson Over a year ago

@haskell00 try adding start before

Haskell00 Over a year ago

Thanks a lot, you gave me a clue to my problem. I solved the problem using this command Process p = runtime.exec("cmd.exe /c cd \""+ "C:\\Users\\WIN8\\Desktop\\test" +"\" & start cmd.exe /k \"ghci test.hs\"");

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