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:
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.
