Java Tutorial
Our core Java programming tutorial is designed for students and working professionals. Java is an object-oriented, class-based, concurrent, secured and
JavaScript Switch
The JavaScript switch statement is used to execute one code from multiple expressions. It is just like else if statement that we
JavaScript If-else
The JavaScript if-else statement is used to execute the code whether condition is true or false. There are three forms of if
JavaScript Operators
JavaScript operators are symbols that are used to perform operations on operands. For example: var sum=10+20; Here,
Javascript Data Types
JavaScript provides different data types to hold different types of values. There are two types of data types in JavaScript. Primitive
JavaScript Global Variable
A JavaScript global variable is declared outside the function or declared with window object. It can be accessed from any function.
HttpServlet class
The HttpServlet class extends the GenericServlet class and implements Serializable interface. It provides http specific methods such as doGet,
Life Cycle of a Servlet (Servlet Life Cycle)
The web container maintains the life cycle of a servlet instance. Let's see the life cycle of the servlet:
GenericServlet class
GenericServlet class implements Servlet, ServletConfig and Serializableinterfaces. It provides the implementation of all the methods of these interfaces except the service method. GenericServlet class
Servlet Interface
Servlet interface provides commonbehaviorto all the servlets.Servlet interface defines methods that all servlets must implement. Servlet interface needs to be