Pattern

Design Pattern

1. creational pattern 2. structural Pattern 3. Behavioral Pattern

1. Creational Pattern

It have some types. They are Abstract factory, Singleton Factory ,prototype pattern etc..


a. singleton factory:- No more than one instance . It provides a single global point of access to that instance.

For Example coding: (Database Connection)

public class DatabaseConnectionFactory {

private static DatabaseConnectionFactory DBfactory = new DatabaseConnectionFactory();

public static DatabaseConnectionFactory getInstance() {
return DBfactory;
}

private DatabaseConnectionFactory() {

}

public Connection getDBConnection() {
DatabaseConnect dbase = new DatabaseConnect();
return dbase.getConnection();
}

}

b. Abstract factory:- Provides an interface to create and return one of several families of related objects.

c. Prototype Pattern :- Initialized and instantiated class and copies or clone it to new instances rather than creating new instances.