python - Running a .py file from Java

Question

I am trying to execute a .py file from java code. I move the .py file in the default dir of my java project and I call it using the following code:

    String cmd = "python/";
    String py = "file";
    String run = "python  " +cmd+ py + ".py";
    System.out.println(run);
    //Runtime.getRuntime().exec(run);

    Process p = Runtime.getRuntime().exec("python  file.py");

Either using variable run, or the whole path or "python file.py" my code is running showing the message build successful total time 0 seconds without execute the file.py. What is my problem here?

Answer 1

You can use like this also:

String command = "python /c start python pathoscriptscript.py";
Process p = Runtime.getRuntime().exec(command + param );

or

String prg = "import sys";
BufferedWriter out = new BufferedWriter(new FileWriter("path/a.py"));
out.write(prg);
out.close();
Process p = Runtime.getRuntime().exec("python path/a.py");
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String ret = in.readLine();
System.out.println("value is : "+ret);

Run Python script from Java