Question

I want to execute a external .exe program from within java. The .exe is a CLI application which takes input in runtime( scanf() ) and outputs depending on the input. I can call the program to execute from java using

Process p = Runtime.getRuntime().exec("cmd /c start a.exe");

instead of

Process p = Runtime.getRuntime().exec("cmd /c start a.exe");

But I think it is also possible to call a program from within java. I have my whole program written in C++ just need a GUI which is written in java. There are a few things to notice:=

1) The communication with the .exe should be runtime (not through main(args) )
2) The java program should take the outputs and store in some variable / panel to use for future
3) Program to be executed can differ ( for example user may select a .exe that doesnt take any input at all)
……..So basically the java GUI will act as a RuntimeEnv

 public void runEXE() 

       {
            String s = null;

            try {
                Process p = Runtime.getRuntime().exec("cmd /c a.exe");
                System.exit(0);
            }
            catch (IOException e) {
                System.out.println("exception happened - here's what I know: ");
                e.printStackTrace();
                System.exit(-1);
            }

       }

I know there are a lot of questions about this topic out there. But i cant find any of them much useful.

Answer 1

The solution can be found here
Problem getting output and passing input to a executing process running under java