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

• Daniel Persson: Do you need the cmd for path or something? You could call the ghci.exe or ghci.com directly with params I guess?
• Haskell00: @DanielPersson I tried to call ghci earlier it works, however the cmd window does not appear.
• Daniel Persson: so you want to run cmd /c ghci.exe test.ha?
• Daniel Persson: /c stands for command.
• Haskell00: @DanielPersson yes exactly and appear the command line window image number 2

Answer 1

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?

• Daniel Persson: try adding start before cmd
• Haskell00: 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: @haskell00 try adding start before
• Haskell00: 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\"")