Use Runtime.getRuntime().exec(String[] cmdarray, String[] envy, File dir)

Question

I want to use Runtime.getRuntime().exec(String[] cmdarray, String[] envy, File dir) ,because I use relative direction in my python program. When I write this code; it doesn't work and no error report is shown.

  Process proc1=Runtime.getRuntime().exec("python /Users/g/Documents/Project/fyp/Q/__init__.py 453454336"，，/Users/g/Documents/Project/fyp/Q/)
proc1.waitFor();

I use java in my mac. python version is 2.7.

Actually what I want to do in Terminal is:

cd /Users/g/Documents/Project/fyp/Q/
python __init__.py

Answer 1

Seems as if you are passing some arguments to your .py file simply use

String command = "python /Users/g/Documents/Project/fyp/Q/__init__.py 453454336"
Runtime.getRuntime().exec(command)

Make sure you pass null to the environment variables array and third parameter is actually a File object.

Use following code...!

File directory = new File("/Users/g/Documents/Project/fyp/Q/"); 
Process proc1=Runtime.getRuntime().exec("python /Users/g/Documents/Project/fyp/Q/__init__.py 453454336"，null，directory)