54. Code that uses a hash map

• 
  // create an empty hash map
  HashMap<String,String> books = new HashMap<>();
  
  // add three entries
  books.put("wooz", "Wizard of Oz");
  books.put("mbdk", "Moby Dick");
  books.put("wuth", "Wuthering Heights");
  
  // print the entries
  for (Map.Entry book : books.entrySet())
      System.out.println(book.getKey() + ": " + 
          book.getValue());
  
  // print the entry whose key is "mbdk"
  System.out.println("\nCode mbdk is " + 
      books.get("mbdk"));
  
  

  Resulting output for code that uses a hash map

  
  wuth: Wuthering Heights
  mbdk: Moby Dick
  wooz: Wizard of Oz
  
  Code mbdk is Moby Dick