// File: TestHashtable2.java
//
// Author: Rahul Simha
// Created: Sept 23, 1998
//
// Hashtables: duplicates.

import java.util.Hashtable;

public class TestHashtable2 {

  public static void main (String[] argv)
  {
    Hashtable h = new Hashtable ();

    // Insert a string and a key.
    h.put ("Ali", "Anorexic Ali");
    h.put ("Bill", "Bulimic Bill");
    h.put ("Chen", "Cadaverous Chen");
    h.put ("Dave", "Dyspeptic Dave");

    // Only one value can be stored for a particular key.
    // Old value with same key is deleted.
    h.put ("Dave", "Duplicitous Dave");
    String d = (String) h.get ("Dave");
    System.out.println (d);  // Prints "Duplicitous Dave"

    // You can get back the old value at the 
    // time of insertion.
    String c = (String) h.put ("Bill", "Blasphemous Bill");
    System.out.println (c);  // Prints "Bulimic Bill"

    // The return value is null otherwise.
    String e = (String) h.put ("Ed", "Egregious Ed");
    System.out.println (e);  // Prints "null".
  }

}