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Struts2 Interview Questions and Answers

Struts2 is one of the famous framework for developing web application in java. Recently I have wrote a lot of Struts2 Tutorials and in this post, I am listing down some of the important ...
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Servlet Exception and Error Handling Example Tutorial

Sometime back I wrote a post about Exception Handling in Java but when it comes to web application, we need more than normal exception handling in java. Servlet Exception If you notice, ...
java-interview-questions-answers

50 Servlet Interview Questions and Answers

Servlets are very important topic of Java EE and all of the web applications framework such as Spring and Struts are built on top of it. This makes servlet a hot topic in Java interviews. Here ...
java-interview-questions-answers

Async Servlet Feature of Servlet 3

Before we jump into understanding what Async Servlet is, let’s try to understand why do we need it. Let’s say we have a Servlet that takes a lot of time to process, something like ...
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Servlet Upload File and Download File Example

File Upload and Download and common tasks in a java web application. Since I have written a lot about java servlet recently, I thought to provide a sample example of file upload and ...
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State Design Pattern in Java – Example Tutorial

State pattern is one of the behavioral design pattern. State design pattern is used when an Object change it’s behavior based on it’s internal state. If we have to change the behavior ...
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Strategy Design Pattern in Java – Example Tutorial

Strategy pattern is one of the behavioral design pattern. Strategy pattern is used when we have multiple algorithm for a specific task and client decides the actual implementation to ...
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Template Method Design Pattern in Java

Template Method is a behavioral design pattern and it’s used to create a method stub and deferring some of the steps of implementation to the subclasses. Template method defines the ...
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Visitor Design Pattern in Java – Example Tutorial

Visitor Pattern is one of the behavioral design pattern. Visitor pattern is used when we have to perform an operation on a group of similar kind of Objects. With the help of visitor ...
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Multiple Inheritance in Java and Composition vs Inheritance

Sometime back I wrote few posts about inheritance, interface and composition in java. In this post, we will look into multiple inheritance and then learn about benefits of composition ...
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