Use XML with Properties
import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.Date; import java.util.Properties; public class Main { public static void main(String args[]) throws Exception { Properties p = new Properties(); p.put("today", new Date().toString()); p.put("user", "A"); FileOutputStream out = new FileOutputStream("user.props"); p.storeToXML(out, "updated"); FileInputStream in = new FileInputStream("user.props"); p.loadFromXML(in); p.list(System.out); } } /* The XML looks like <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> <properties> <comment>your wordings</comment> <entry key="user">A</entry> <entry key="today">12/12/2009</entry> </properties> */