Hashtable elements() Method in Java

The elements() method in the Hashtable class in Java returns an enumeration of the values contained in the hashtable. The enumeration returned by this method traverses the hashtable’s values in the order in which they were added to the hashtable.

The elements() method is inherited from the java.util.Hashtable class’s parent class, java.util.Dictionary.

Here’s an example of using the elements() method:

Java

import java.util.Enumeration;
import java.util.Hashtable;

public class HashtableExample {
    public static void main(String[] args) {
        Hashtable<String, Integer> ht = new Hashtable<>();
        ht.put("Alice", 25);
        ht.put("Bob", 30);
        ht.put("Charlie", 35);

        Enumeration<Integer> values = ht.elements();
        while (values.hasMoreElements()) {
            System.out.println(values.nextElement());
        }
    }
}

Output

30
35
25

The java.util.Hashtable.elements() method of the Hashtable class in Java is used to get the enumeration of the values present in the hashtable. Syntax:

Enumeration enu = Hash_table.elements()

Parameters: The method does not take any parameters. 

Return value: The method returns an enumeration of the values of the Hashtable. Below programs are used to illustrate the working of the java.util.Hashtable.elements() method: 

Program 1:

Java

// Java code to illustrate the elements() method
import java.util.*;

public class Hash_Table_Demo {
    public static void main(String[] args)
    {

        // Creating an empty Hashtable
        Hashtable<Integer, String> hash_table
            = new Hashtable<Integer, String>();

        // Inserting elements into the table
        hash_table.put(10, "Geeks");
        hash_table.put(15, "4");
        hash_table.put(20, "Geeks");
        hash_table.put(25, "Welcomes");
        hash_table.put(30, "You");

        // Displaying the Hashtable
        System.out.println("The Table is: " + hash_table);

        // Creating an empty enumeration to store
        Enumeration enu = hash_table.elements();

        System.out.println(
            "The enumeration of values are:");

        // Displaying the Enumeration
        while (enu.hasMoreElements()) {
            System.out.println(enu.nextElement());
        }
    }
}

Output:

The Table is: {10=Geeks, 20=Geeks, 30=You, 15=4, 25=Welcomes}
The enumeration of values are:
Geeks
Geeks
You
4
Welcomes

Program 2:

Java

// Java code to illustrate the elements() method
import java.util.*;

public class Hash_Table_Demo {
    public static void main(String[] args)
    {

        // Creating an empty Hashtable
        Hashtable<String, Integer> hash_table
            = new Hashtable<String, Integer>();

        // Inserting elements into the table
        hash_table.put("Geeks", 10);
        hash_table.put("4", 15);
        hash_table.put("Geeks", 20);
        hash_table.put("Welcomes", 25);
        hash_table.put("You", 30);

        // Displaying the Hashtable
        System.out.println("The Table is: " + hash_table);

        // Creating an empty enumeration to store
        Enumeration enu = hash_table.elements();

        System.out.println(
            "The enumeration of values are:");

        // Displaying the Enumeration
        while (enu.hasMoreElements()) {
            System.out.println(enu.nextElement());
        }
    }
}

Output:

The Table is: {You=30, Welcomes=25, 4=15, Geeks=20}
The enumeration of values are:
30
25
15
20