Hashtable
Hashtable values Iterator example
This is an example of how to obtain a Hashtable values Iterator, that is an iterator of the values of the Hashtable. Obtaining a Hashtable values Iterator implies that you should:
- Create a new Hashtable.
- Populate the hashtable with elements, using
put(K key, V value)
API method of Hashtable. - Invoke
elements()
API method of Hashtable. It returns an Enumeration of the values in this hashtable. - Use the Enumeration methods
hasMoreElements()
andnextElement()
on the returned enumeration to fetch the elements sequentially.
Let’s take a look at the code snippet that follows:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | package com.javacodegeeks.snippets.core; import java.util.Hashtable; import java.util.Enumeration; public class HashtableValuesIterator { public static void main(String[] args) { // Create a Hashtable and populate it with elements Hashtable hashtable = new Hashtable(); hashtable.put( "key_1" , "value_1" ); hashtable.put( "key_2" , "value_2" ); hashtable.put( "key_3" , "value_3" ); // Enumeration elements() operation returns an Enumeration of values contained in Hashtable Enumeration valuesEnumeration = hashtable.elements(); // Iterate through Hashtable values Enumeration System.out.println( "Hashtable values : " ); while (valuesEnumeration.hasMoreElements()) System.out.println(valuesEnumeration.nextElement()); } } |
Output:
Hashtable values :
value_3
value_2
value_1
This was an example of how to obtain a Hashtable values Iterator in Java.