Provide an interface for creating families of related or dependent objects without specifying their concrete classes.

Source Code

/**  * Abstract factory declares an interface for operations that create abstract  * product objects.  *   * @role __Factory  */ public interface AbstractFactory {         /**   * Creates abstract product   */         ProductA createProductA();        /**   * Creates abstract product   */         ProductB createProductB();}  /**  * Abstract factory declares an interface for operations that create abstract  * product objects.  *   * @role __Factory  */ public interface AbstractFactory {         /**   * Creates abstract product   */         ProductA createProductA();        /**   * Creates abstract product   */         ProductB createProductB();}  /**  * Abstract product - an interface for a type of Product object.  *   * @role __Product  * @see AbstractFactory  */ public interface ProductA {          /*   * add product method declarations here   */ }  /**  * Concrete Factory implements operations of AbstractFactory to create Concrete  * product objects.  */ public class MyFactory implements AbstractFactory {          /**   * Creates concrete product ConcreteProduct1   */         public ProductA createProductA() {                 return new ConcreteProduct1();        }          /**   * Creates concrete product ConcreteProduct2   */         public ProductB createProductB() {                 return new ConcreteProduct2();        }  }  /**  * Concrete product defines a product object to be created by the corresponding  * concrete factory.  *   * @see MyFactory  */ public class ConcreteProduct1 implements ProductA {  }  /**  * Concrete product defines a product object to be created by the corresponding  * concrete factory.  *   * @see MyFactory  */ public class ConcreteProduct2 implements ProductB {  }