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A package is a group of similar types of classes, interfaces and sub-packages. Package can be categorized in two form, built-in package and user-defined package. There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc. Here, we will have the detailed learning of creating and using user-defined packages.

Runtime Polymorphism. Let's learn what is runtime polymorphism with suitable example.

Normally, array is a collection of similar type of elements that have contigious memory location. In java, array is an object the contains elements of similar data type. It is a data structure where we store similar elements. We can store only fixed elements in an array.

Variable and Datatype in Java. Variable is a reserved area allocated in memory.There are three types of variable local,instance and static.There are 8 primitive data types.

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"Welcome to the home of Spring, the leading platform to build and run enterprise Java applications. Led and sustained by SpringSource, Spring delivers significant benefits for many projects, increasing development productivity and runtime performance while improving test coverage and application quality."

iPOJO is a service component runtime aiming to simplify OSGi application development. It natively supports ALL the dynamism of OSGi. Based on the concept of POJO, application logic is developed easily. Non-functional properties are just injected in the component at runtime. iPOJO strength points are : components are developed as POJO, nothing else is required ! the component model is extensible, so feel free to adapt it to your needs the standard component model manages service providing and service dependencies, and so can require any other OSGi services iPOJO manages the component instance lifecycle and the environment dynamics as it has never been possible iPOJO provides a powerful composition system to create highly dynamic applications iPOJO supports annotations, XML or Java-based API to define the component

"Spring Surf is a view composition framework for Spring MVC that plugs into your existing Spring applications. It provides a scriptable and content-centric approach to building web applications. You can drop Spring Surf right into your existing Spring web applications or you can begin building new Spring Surf applications using SpringSource Tool Suite or Spring Roo's command-line magic."

Encapsulation is a process of wrapping code and data together into a single unit. It is a way to achieve data hiding.

Instance Initializer block is used to initialize the instance variable.Let's see what is its advantage over instance variable.

super keyword. The super is used to refer the immediate parent class object. There are three usage of super. Let's see:

Advantage of OOPs Naming Convention Object and Class Method Overloading Constructor static keyword this keyword Inheritance(IS-A) Aggregation(HAS-A) Method Overriding Covariant Return Type super keyword Instance Initializer block final keyword Runtime Polymorphism Dynamic Binding instanceof operator Abstract class Interface Package Access Modifiers Encapsulation Object class Object Cloning Java Array Call By Value strictfp keyword API Document Command Line Arg

Let's learn what is naming convention and what are its benefits.

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Are you unsure which JavaScript is best for your application? Or are you confused between angular Js and js? This article will explain the differences between angular Js and React Js.

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"The Spring Surf Project is a dedicated to the development of Spring Surf. "

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