Monday, 2 March 2015

Java : Collection Framework : Hashtable (isEmpty)


Click here to watch in Youtube :
https://www.youtube.com/watch?v=jT0ZTVJfHAY&list=UUhwKlOVR041tngjerWxVccw

HashtableExample.java
import java.util.Hashtable;

/*
 * Example of isEmpty() method.
 */
public class HashtableExample
{
    public static void main( String[] args )
    {

        Hashtable<String, String> hashtable = new Hashtable<String, String>();

        System.out.println("hashtable : " + hashtable);

        /*
         * Tests if this hashtable maps no keys to values.
         */
        boolean isEmpty = hashtable.isEmpty();

        System.out.println("isEmpty : " + isEmpty + "\n");

        /*
         * Key = CountryCode,Value = CountryName
         */
        hashtable.put("AF", "AFGHANISTAN");
        hashtable.put("BE", "BELGIUM");
        hashtable.put("US", "UNITED STATES");
        hashtable.put("IN", "INDIA");

        System.out.println("hashtable : " + hashtable);

        isEmpty = hashtable.isEmpty();

        System.out.println("isEmpty : " + isEmpty);

    }
}
Output
hashtable : {}
isEmpty : true

hashtable : {IN=INDIA, AF=AFGHANISTAN, BE=BELGIUM, US=UNITED STATES}
isEmpty : false
To Download HashtableDemoIsEmpty Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/HashtableDemoIsEmpty.zip?attredirects=0&d=1

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
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