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Session tracking in servlets by using HttpSession

HttpSession Interface It is one of the session tracking techniques. It basically creates a session for each user and is used to maintain the request data and time interval of a particular. A user may give more than one requests at a particul...

Abstraction in java

Abstraction is defined as the hiding of backend content/details and only providing necessary information. There are two ways to achieve abstraction:- Abstract class Interface ABSTRACT CLASS:- The class which is declared as abstract is known...

Interface vs Abstract Class

Interface Interface can extend many interface. Interface can extend from a interface only. Interface have only abstract method by default. Interface can have public method only it it. Abstract Abstract can attend only on class at a time. ...


Interface is the way to get the multiple inheritance. This means that a class can inherit two or more class. As java, we can not extend more than one class but we can extend more than one interface. So Interface is used to have inheritance Bu...

Enumeration Interface in Java

Enumeration is used to retrieve or traverse all the elements of particular collection of objects. Its not considered for collections but we can use it for legacy like Vectors. To use it we need to import - Java.util.Enumeration Below is the ...
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