What is Servlets and its need? Classes and interfaces to develop Servlets Life Cycle of Servlet and its Method Steps to develop and deploy a Servlet Understanding web.xml [ a deployment descriptor ] Examples...
Introduction to J2EE Model 1 Architecture Model 2 Architecture[ MVC : Model View Controller ] J2EE as Multi Tier Architecture Terminology in J2EE J2EE Containers and its Type Application Servers Available for J2EE Components...
Template Method Design Pattern Examples Template Method Design Pattern Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template Method lets subclasses redefine certain steps of an algorithm without...
Strategy Design Pattern Examples Strategy Design Pattern Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it. Also Known As :...
State Design Pattern Examples State Design Pattern Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. Also Known As : Objects for States...
Observer Design Pattern Examples Observer Design Pattern Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. Also Known As : Dependents, Publish-Subscribe...
Command Design Pattern Examples Command Design Pattern Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations. Also Known As : Action,...
Proxy Design Pattern Examples Proxy Design Pattern Provide a surrogate or placeholder for another object to control access to it. Also Known As :Surrogate (A person appointed to represent or act on behalf of...
Flyweight Design Pattern Examples Flyweight Design Pattern Use sharing to support large numbers of fine-grained objects efficiently. Use the Flyweight pattern when The Flyweight pattern’s effectiveness depends heavily on how and where it’s used....
Facade Design Pattern Examples Facade Design Pattern Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use. Use the Facade...
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