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Calling python function from java . NEED HELP URGENT

Geetu Kumari
Greenhorn

Joined: Mar 10, 2008
Posts: 5
Hi

I want to call python function from java Class OR execute python file from java Class
if possible Please explain me with piece of code urgently .......

Thanks in advance,
Geeta

I tried for this ... but it not giving any error and not executing also .....

public class MyJavaClass
{
public static void main(String[] args)
{
try
{
System.out.println("start");
String file = "/home/geeta/Install/newEclipse/NoCrashPlease/testWebProject/src/pythonPrograms/test.py" ;
Process p =Runtime.getRuntime().exec("chmod -R 777 " + file);
p.waitFor();
p = Runtime.getRuntime().exec("python " +file);
p.waitFor();
System.out.println("end........................");
}
catch (Exception e)
{
e.printStackTrace();
}
}
}

/* test.py contain */
print 'SUCCESS'
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 42277
    
  64
Instead of Runtime.exec(String) I'd recommend to use Runtime.exec(String[]). This and other tips on using Runtime.exec -like dealing with the process's streams- are explained in detail in the article "When Runtime.exec() doesn't" by Daconta (which is really required reading when using it).


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Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39409
    
  28
Ulf Dittmer wrote:"When Runtime.exec() doesn't"
I think it's spelt "When Runtime.exec() won't", but as Ulf has said, you need to find it with Google and read it. It is a little easier now the ProcessBuilder class has been introduced, but only slightly easier. And don't go saying your request is urgent.

This question is too difficult for the beginners' forum. Moving.
Ernest Friedman-Hill
author and iconoclast
Marshal

Joined: Jul 08, 2003
Posts: 24187
    
  34

There's also a rather nice Java implementation of Python called Jython, which you can embed directly in your Java program.


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Geetu Kumari
Greenhorn

Joined: Mar 10, 2008
Posts: 5
Thank you,
Ulf Dittmer and Campbell Ritchie



" When Runtime.exec() won't " It is really helpful.

Thanks again !!!
 
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