How do I retrieve the System Properties on Windows Machine using Java

There are different ways to get the System properties of a System or Machine using Java Program. 

The following code first create a file called SystemProperties.xml and then retrieves all the System Property using Java's own function called getProperties() of Properties class and finally dumps it to the the created XML File.

SystemProperties.java

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import java.util.Properties;

import java.io.PrintStream;

import java.io.File;

/*

  File   : SystemProperties.java

  Purpose: Dumps all the System Properties and values to a XML file

  Author : Anaparthi Subrahmanyam 

  Published: 2008-12-27

  Usage Notification: Author doesnt own responsibility of any loss of data, responsibility for misuse or loss of any nature if this      code is used. If possible, please provide link to this webpage

*/

public class SystemProperties 

{

  public static void main(String[] args) 

  {

    try

    {

       File f = new File("SystemProperties.xml");

       //if creating a file called SystemProperties.xml, if returns false, exception will be thrown

       if(!f.createNewFile())

       {

          throw new Exception("Exception encoutered may be due to the file already exist.");

       }

       Properties prop = System.getProperties();

       // opening file in print stream so that later this stream will be used to write 

       PrintStream pst = new PrintStream(f.getName());

       // Passing three parameters to the storeToXML.

       //1. printstream

       //2. Comment to the XML File 

       //3. encoding format

       prop.storeToXML(pst,"System Properties details", "UTF-8");

       System.out.println("Sucessfully dumped the System Details to the file: " +f.getName());

    }

    catch (Exception e)

    {

      System.out.println("Error: "+e.getMessage());

    }

   }

}

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