Hashtable h = new Hashtable( );
h.put("string", "Gabriel Garcia Marquez");
h.put("int", new Integer(26));
h.put("double", new Double(Math.PI));
try {
FileOutputStream fileOut = new FileOutputStream("h.ser");
ObjectOutputStream out = new ObjectOutputStream(fileOut);
out.writeObject(h);
}
catch (Exception e) {
System.out.println(e);
}