How can I Monitor External files in Java

Question

I have a .exe file, It takes .txt file as a Input and it returns .txt files as outputs.

I have 2 folders names are Inpu

Answer 1

For running an external process (a .exe program in this case), forget about Runtime.exec(). Instead use ProcessBuilder; the documentation states that it's the preferred way to start up a sub-process these days.

Answer 2

Follow this quick tutorial over running .exe from java. It should be sufficient (4pages)

http://www.javaworld.com/jw-12-2000/jw-1229-traps.html?page=1

example

import java.util.*;
import java.io.*;

public class GoodWindowsExec
{
    public static void main(String args[])
    {


        try
        {            


            Runtime rt = Runtime.getRuntime();

            Process proc = rt.exec("cmd.exe /C ping"); // executing ping through commandshell of windows

            proc.getErrorStream() // errorstream

            proc.getInputStream()  // outputstream


            int exitVal = proc.waitFor(); // wait till process ends    
        } catch (Throwable t)
          {
            t.printStackTrace();
          }
    }
}