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To access data in an ArrayList, we specified the index. In order to access a value in a HashMap, we specify the key:

HashMap<String, Integer> myFriends = new HashMap<String, Integer>(); myFriends.put("Mark", 24); myFriends.put("Cassandra", 25); myFriends.put("Zenas", 21); System.out.println( myFriends.get("Zenas") );

In the example above, we call the get method on the myFriends HashMap using the key "Zenas". The console will print the value associated with "Zenas" which is 21.

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