JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Enumeration Sample Code

Description:

A class that implements Enumeration interface provides access to series of elements one at a time. You need to call nextElement method to get next element in the series. Also hasMoreElements() method gives you status about the availability of next element in the series.


Code:
package com.myjava.Enumeration;

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

public class MyEnumeration {
    public static void main(String a[]){
        Vector<String> lang = new Vector<String>();
        Enumeration<String> en = null;
        lang.add("JAVA");
        lang.add("JSP");
        lang.add("SERVLET");
        lang.add("EJB");
        lang.add("PHP");
        lang.add("PERL");
        en = lang.elements();
        while(en.hasMoreElements()){
            System.out.println(en.nextElement());
        }
    }
}

Example Output

JAVA
JSP
SERVLET
EJB
PHP
PERL

List Of Collection Classes Sample Programs:


List Of Util Classes Sample Programs:

Knowledge Centre
Interface and its usage
Interface is similar to a class which may contain method's signature only but not bodies and it is a formal set of method and constant declarations that must be defined by the class that implements it. Interfaces are useful for declaring methods that one or more classes are expected to implement, capturing similarities between unrelated classes without forcing a class relationship and determining an object's programming interface without revealing the actual body of the class.

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Reference: Java™ Platform Standard Ed. 6 - API Specification | Java is registered trademark of Oracle.
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