Java tutorial
import java.io.FileOutputStream; import java.io.ObjectOutputStream; import java.util.Hashtable; public class Main { public static void main(String[] args) throws Exception { Hashtable h = new Hashtable(); h.put("string", "AAA"); h.put("int", new Integer(26)); h.put("double", new Double(Math.PI)); FileOutputStream fileOut = new FileOutputStream("hashtable.ser"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(h); FileInputStream fileIn = new FileInputStream("h.ser"); ObjectInputStream in = new ObjectInputStream(fileIn); Hashtable h = (Hashtable) in.readObject(); System.out.println(h.toString()); } }