Execute external program

Question

I tried to make an application that calls an external program that I have to pass two parameters. It doesn't give any errors.

The program.exe, written in C++, takes a picture and modifies the content of a .txt file.

The Java program runs but it does nothing-

Here is my sample code:

    String[] params = new String [3];     params[0] = "C:\\Users\\user\\Desktop\\program.exe";     params[1] = "C:\\Users\\user\\Desktop\\images.jpg";     params[2] = "C:\\Users\\user\\Desktop\\images2.txt";     Runtime.getRuntime().exec(params); 

Answer 1

borrowed this shamely from here

Process process = new ProcessBuilder("C:\\PathToExe\\MyExe.exe","param1","param2").start(); InputStream is = process.getInputStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader br = new BufferedReader(isr); String line;  System.out.printf("Output of running %s is:", Arrays.toString(args));  while ((line = br.readLine()) != null) {   System.out.println(line); } 

More information here

Other issues on how to pass commands here and here

Answer 2

You might also try its more modern cousin, ProcessBuilder:

Java Runtime.getRuntime().exec() alternatives