Runtime类

package joeho.net.csdn.blog;

import java.util.*;

public class TestProperties {
 
 /**
  * Method main
  *
  *
  * @param args
  *
  */
 public static void main(String[] args) {
 
  Properties sp = System.getProperties();
  Enumeration em = sp.propertyNames();
  while(em.hasMoreElements())
  {
   String key =(String)em.nextElement();
   System.out.println(key+"="+sp.getProperty(key));
  }
  Process P = null;
  try{ 
   P=Runtime.getRuntime().exec("notepad.exe TestProperties.java");
   Thread.sleep(5000);
   P.destroy();
   
  }catch(Exception e){e.printStackTrace();}
 } 
}