Advanced Java-(JEE) Notes by KVR sir pdf Download

Advanced Java (JEE) notes is given by Mr.K.Venkateswara Rao sir from Sathya Technologies, Ameerpeta, Hyderabad. All the students call him as KVR simply. He has given core java notes is well explained by him. His clean explanation can anyone can understand easily. The way of explanation is unique from others in the Ameerpeta even when compare to Durga sir. I did not find any information about KVR to publish here.If you guys find any info please leave a message as comment below.

Read more..

How to change Context-root of an application in MyEclipse

Before going to develop a web application, make sure all the settings and properties of MyEclipse, java and tomcat settings. If you have any doubts while Configuring java in MyEclipse or Installing and configuring Tomcat in your local machine or Configure the Tomcat in your MyEclipse to develop your web application take a look at my previous posts.

Normally we work on the same project most of the time with the same application name(context-root). When ever we take a new workspace in our local machines we may confuse while deploying the application in Tomcat or any other server. Other wise we have to remove the old deployed project and deploy the latest project. To overcome this problem, we can change the Context-root of our application. So that we can deploy the same web application with different names.

Read more..

What is Reflection and How it Works in Java

“Reflection is the process of obtaining runtime information about the class or interface.”

Runtime information is nothing but deal with the following:

1. Finding the name of the class or interface. 
2.  Finding the data members of the class or interface. 
3. Finding number of constructors (default constructor and number of parameterized constructors).
4. Number of instance methods.
5. Number of static methods. 
6. Determining modifiers of the class (modifiers of the class can be public, final, public + final,abstract and public + abstract).
7. Obtaining super class of a derived class. 
8. Obtaining the interfaces which are implemented by various classes.

Read more..

Difference between ServletContext and ServletConfig

What is the difference between ServletConfig and ServletContext?
ServletContext and ServletConfig both are interfaces.ServletContext is one per application and within the application serveral Servlets will be defined. Each Servlet will be having a ServletConfig object. Even for jsp page.You can understand easily by the image given below.

Read more..

JDBC - CallableStatement IN, OUT, INOUT parameters

The CallableStatement interface allows the use of SQL statements to call stored procedures. Stored procedures are programs that have a database interface.
These programs possess the following:
1)    They can have input and output parameters, or parameters that    are   both input and output.
2)    They can have a return value.
3)    They have the ability to return multiple ResultSets.

Conceptually in JDBC, a stored procedure call is a single call to the database, but the program associated with the stored procedure may process hundreds of database requests. The stored procedure program may also perform a number of other programmatic tasks not typically done with SQL statements.

Read more..

Disadvantages of MVC Architecture

In the development of MVC architecture based web application not only we need to use multiple technologies , but we also need to use(follow) set of rules in the development of web application. Also for parallel development of application more programmers with knowledge on multiple technologies is required.

Read more..

1.Web Application introduction.

WebApplication is a collection of web resources like HTML files, JavaScript files, image files Servlets, jsps and etc.

Read more..