How to run external .exe programs from java

[freesoft_2000]

Hi everyone,

Could some one please tell me or show me the entire codings of how to run external .exe programs in java. I want to do this because i have a lot c/vb programs that i want to run in my java program.

Thank You

Yours Sincerely

Richard West

[BlackDeath]

the code goes like this:

try
{
 Runtime rt = Rintime.getRuntime() ;
 Process p = rt.exec("Program.exe") ;
 InputStream in = p.getInputStream() ;
 OutputStream out = p.getOutputStream ();
 InputSream err = p,getErrorStram() ;
 
//do whatever you want
 //some more code
 
 p.destroy() ;
}catch(Exception exc){/*handle exception*/}

[nanosani]

try out this code ... it will not be platform independent ....
Process p = Runtime.getRuntime().exec("c:\myprogram.exe");

I dont have the time to test it .... if you succeed please tell me too.
:eek:

[freesoft_2000]

Hi everyone,
The above codes only seem to run external .exe programs but what if i want to run external jar programs. Could someone show me or e-mail me the codings of how to do this the right way.

Thank You

Yours Sincerely

Richard West

[nanosani]

Read about the dynamic class loader

http://java.sun.com/j2se/1.4.2/docs...lassLoader.html

[ozzytx]

i'm using the code from above to try to run a program and here's my problem... when i call an exe that i wrote in VB, the program runs fine. if i call a c or c++ program the program loads into memory (i see it in the processes tab) but the console doesn't open up with the program in it.
here's the code i have right now for it...

try
   {
    Runtime rt = Runtime.getRuntime();
    Process p = rt.exec("vbex.exe");
    InputStream in = p.getInputStream();
    OutputStream out = p.getOutputStream();
    InputStream err = p.getErrorStream();

    p.destroy() ;
    }catch(Exception exc){/*handle exception*/}

[freesoft_2000]

hi everyone,

Do this instead

void run ()
{
try
{
Runtime rt = Runtime.getRuntime();
Process p = rt.exec("vbex.exe");
}

catch(Exception e)
{

}

}

I hope this helps you

Richard West

[subroto1486]

HI EVERYBODY,
I have a question regarding this i used this to call exe application but it is opening independently, but what if i want to run that particular exe in the frame itsself like an JInternal Frame..

Please help me regaridng this..

Thanks in advance..

Subroto Bhattacharjee

[tsmc]

Hi,

The following example shows opening a notepad using java application.

[url removed]

[JamesCherrill]

There are a load of answers in this 2004 zombie thread using Runtime.exec to run an external process, but this was superseded in Java 5 (JDK 1.5) with ProcessBuilder, which is now preferred to Runtime.exec
http://www.java-tips.org/java-se-tips/java.util/from-runtime.exec-to-processbuilder.html