Interaction between Java App and Python App

Question

I have a python application which I cant edit its a black box from my point of view. The python application knows how to process text and return processed text. I have anoth

Answer 1

Use ProcessBuilder to execute your Python code as a filter:

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class PBTest {

    public static void main(String[] args) {
        ProcessBuilder pb = new ProcessBuilder("python", "-c", "print 42");
        pb.redirectErrorStream(true);
        try {
            Process p = pb.start();
            String s;
            BufferedReader stdout = new BufferedReader (
                new InputStreamReader(p.getInputStream()));
            while ((s = stdout.readLine()) != null) {
                System.out.println(s);
            }
            System.out.println("Exit value: " + p.waitFor());
            p.getInputStream().close();
            p.getOutputStream().close();
            p.getErrorStream().close();
         } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}