BE THE CODER > Java > java.io package > External Process Output

The following example shows how to capture the output from an external process. This process could be a DOS Batch script process, VB script process or any other process. Please note that the Batch process's input stream becomes output and output stream becomes input for your java program.

File Name :	com/bethecoder/tutorials/io/ExternalProcOutput.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.io;



import java.io.BufferedReader;

import java.io.InputStreamReader;



public class ExternalProcOutput {



  public static void main(String[] args) {



    String line;

    try {

      Process proc = Runtime.getRuntime().exec("C:\\ex_proc_out.bat");

      BufferedReader procInput = new BufferedReader(

          new InputStreamReader(proc.getInputStream()));

      

      //Read output from batch process

      while ((line = procInput.readLine()) != null) {

        System.out.println(line);

      }

      

      procInput.close();

      

    } catch (Exception e) {

      e.printStackTrace();

    }

  }

}

File Name :

source/com/bethecoder/tutorials/io/ex_proc_out.bat

@echo off
echo Welcome
echo Hello World
echo Good ni8