Problem : Create a program that fetch elements from a collection sequentially.

Contents

1. 1 Program :
   1. 1.1 Step 1 - Coding
   2. 1.2 Step 2 - Deployment
   3. 1.3 Step 3 - Testing
   4. 1.4 Output
2. 2 FAQ
   1. 2.1 What is Enumeration?
   2. 2.2 Most Interesting methods?

Program :

Step 1 - Coding

Create a text file c:\sunilos\Test.java  and copy below contents.

import java.util.Enumeration;
import java.util.Vector;

/*
 * A program to implement Enumeration .
 */

public class TestEnumeration {

    public static void main(String[] args) {
        Vector v = new Vector();

        v.add("Jay");
        v.add("Viru");
        v.add("Basanti");

        // Get all elements and print with help of Enumeration interface
        Enumeration e = v.elements(); // Get java.util.Enumeration objects

        System.out.println("Print All Elements with help of Enumeration ");

        while (e.hasMoreElements()) { // Checks if any element in list
            // Get next available element
            System.out.println(e.nextElement());
        }

    }

}

Step 2 - Deployment

1. Create a folder 'c:\sunilos'. 
2. Create or copy TestEnumeration.java  into 'c:\sunilos' folder.
3. Open your command prompt and go to  'c:\sunilos'
   
4. Compile TestEnumeration.java with help of 
• javac TestEnumeration.java command. Compiled class file will be created in the same folder
  
5. Congratulations!! your Java program is ready to serve.

Step 3 - Testing

1. Make sure you are on Command Prompt under c:\sunilos directory
   
2. Now start your java program from command prompt with help of 
• java TestEnumeration command.

Output

C:\sunilos>java TestEnumeration
Print All Elements with help of Enumeration
Jay
Viru
Basanti

FAQ

What is Enumeration?

1. An object that implements the Enumeration interface generates a series of elements, one at a time.
2. Successive calls to the nextElement method return successive elements of the series.

Most Interesting methods?

• hasMoreElements() - Tests if this enumeration contains more elements.
• nextElement() - Returns the next element of this enumeration if this enumeration object has at least one more element to provide.

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