Java Collections enumeration() Method

The enumeration() is a method of Java Collections class which is used to get the enumeration over the specified collection.

Syntax

Following is the declaration of enumeration() method:

Parameter

Parameter	Description	Required/Optional
c	It is a collections for which enumeration is to be returned.	Required

Returns

The enumeration() method returns the enumeration over the specified collection.

Exceptions

Compatibility Version

Java 1.5 and above

Example 1

import java.util.*;
public class CollectionsEnumerationExample1 {
	public static void main(String[] args) {		
		Vector<String> Enum = new Vector<String>();       
            Enum.add("JAVA");
            Enum.add("JSP");
            Enum.add("SERVLET");
            Enum.add("C");
            Enum.add("PHP");
            Enum.add("PERL");
            //Create Enumeration
            Enumeration<String> en = Collections.enumeration(Enum);
            System.out.println("The Enumeration List are: ");
            while(en.hasMoreElements()){
                 System.out.println(en.nextElement());
            }	     
	}	  
}

Test it Now

Output:

The Enumeration List are: 
JAVA
JSP
SERVLET
C
PHP
PERL

Example 2

import java.util.*;
public class CollectionsEnumerationExample2 {
	public static void main(String[] args) {
		//Create array list object       
	      List<Integer> Enum = new ArrayList<Integer>();		      
            Enum.add(1100);
            Enum.add(2100);
            Enum.add(5100);
            //Create Enumeration
            Enumeration<Integer> en = Collections.enumeration(Enum);
            System.out.println("The Enumeration List are: ");
            while(en.hasMoreElements()){
                 System.out.println(en.nextElement());
            }	     
	}	  
}

Test it Now

Output:

The Enumeration List are: 
1100
2100
5100

Example 3

import java.util.*;
public class CollectionsEnumerationExample3 {
	@SuppressWarnings("unchecked")
	public static void main(String[] args) {
	    ArrayList firstList = new ArrayList();
	    firstList.add(101);
	    firstList.add("Hello");
	    firstList.add("World");
	    firstList.add(true);
	    firstList.add(101.5);	 
	    Enumeration<String> e = Collections.enumeration(firstList);	 
	    System.out.print("Elements using Enumeration: ");
	    while(e.hasMoreElements()) {
	          Object obj = e.nextElement();
	          System.out.print(obj + " ");
	          }
	    }	  
}	

Test it Now

Output:

Elements using Enumeration: 101 Hello World true 101.5

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Java Collections enumeration() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3