///////    ShowProp.java    ///////
import java.io.*;
import java.util.Properties;

class ShowProp
{  public static void main(String[] args)
        throws java.io.IOException
   {  Properties p= System.getProperties();
      p.list(System.out);
      FileOutputStream o = new FileOutputStream("prop.txt");
      p.store(o, "Here it is");
      o.close();
   }
}