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Enumeration interface in java


Enumeration Interface:

It provides the methods to get a series of elements from a collection of object taking one at a time.

Commonly used methods of Enumeration interface:

1. hasMoreElements(): It returns true if more elements are left to iterate otherwise returns false.

Syntax: public boolean hasMoreElements()

2. nextElement(): It returns the next object of the enumeration.

Syntax: public Object nextElement()

 A simple example of Enumeration interface:

EnumerationTest.java

import java.util.Enumeration;
import java.util.Vector;
 
/**
 * This class is used to show the Enumeration functionality.
 * @author codesjava
 */
public class EnumerationTest{
	public static void main(String args[]){
		Enumeration days;
	    Vector weekDays = new Vector();
	    weekDays.add("Sunday");
	    weekDays.add("Monday");
	    weekDays.add("Tuesday");
	    weekDays.add("Wednesday");
	    weekDays.add("Thursday");
	    weekDays.add("Friday");
	    weekDays.add("Saturday");
	    days = weekDays.elements();
 
	    //Iterate the Enumeration object.
	    while (days.hasMoreElements()){
	       System.out.println(days.nextElement()); 
	    }
	}
}

Output:

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday

Download this example.
 
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