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Two TCKs for Eclipse – What is really in it for Open Source?

Back in May Oracle awarded a Compatibility Testing Scholarship to the Eclipse Foundation. This got some attention in media during the last days and I just wanted to make sure that I ...
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Imbibing the Fluency of Mockito

I recently found myself writing some code to integrate two disparate platforms. One of these systems is Java based and the other, while not written in Java, offers a Java API. I’ll ...
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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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Mediator Design Pattern in Java – Example Tutorial

Mediator Pattern is one of the behavioral design pattern, so it deals with the behaviors of objects. Mediator design pattern is used to provide a centralized communication medium between ...
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Memento Design Pattern in Java – Example Tutorial

Memento pattern is one of the behavioral design pattern. Memento design pattern is used when we want to save the state of an object so that we can restore later on. Memento pattern ...
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Asynchronous retry pattern

When you have a piece of code that often fails and must be retried, this Java 7/8 library provides rich and unobtrusive API with fast and scalable solution to this problem:                   ScheduledExecutorService ...
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Observer Design Pattern in Java – Example Tutorial

Observer pattern is one of the behavioral design pattern. Observer design pattern is useful when you are interested in the state of an object and want to get notified whenever there ...
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Custom Deserializer in Jackson and validation

tl;dr: it is important to add input validation to custom json deserializers in Jackson. In RHQ we make use of Json parsing in a few places – be it directly in the as7/Wildfly ...
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Iterator Design Pattern in Java – Example Tutorial

Iterator pattern in one of the behavioral pattern and it’s used to provide a standard way to traverse through a group of Objects. Iterator pattern is widely used in Java Collection ...
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Java Exception Handling Tutorial with Examples and Best Practices

Exception is an error event that can happen during the execution of a program and disrupts its normal flow. Java provides a robust and object oriented way to handle exception scenarios, ...
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