Java Collections enumeration() Method with Examples

by Online Tutorials Library July 22, 2022

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 Enum = new Vector();                     Enum.add(“JAVA”);              Enum.add(“JSP”);              Enum.add(“SERVLET”);              Enum.add(“C”);              Enum.add(“PHP”);              Enum.add(“PERL”);              //Create Enumeration              Enumeration 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 Enum = new ArrayList();                    Enum.add(1100);              Enum.add(2100);              Enum.add(5100);              //Create Enumeration              Enumeration 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 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 with Examples

Java Collections enumeration() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3

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