System Environment

Question

How to get system environment from the Java. For exapmle - I have defines my own application path using Control Panel->System variable. I want to get that value throw java program without using JNI.
For Example - I setted MYPATH=C:\MyApp\Test as a System variable. How tou get this value "C:\MyApp\Test" using the "MYPATH" keyword from Java.
Thanks in advance,
Santa

Answer 1

Try this: (i assume we are talking about MS windows, right?):
import java.io.*;
public class Main {
  public static void main(String[] args) throws Exception {
    String envvar = "PATH";
    Process p = Runtime.getRuntime().exec("cmd /c echo %" + envvar + "%");
    InputStream in = p.getInputStream();
    byte[] buffer = new byte[256];
    int bytesRead = in.read(buffer);
    while (bytesRead != -1) {
      System.out.print(new String(buffer, 0, bytesRead));
      bytesRead = in.read(buffer);
    p.destroy();
}That's ugly, i know, but it works for Win2000 (and other versions of windows i think)