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Getting started with Mocking in Java using Mockito

We all write unit tests but the challenge we face at times is that the unit under test might be dependent on other components. And configuring other components for unit testing is definitely ...

Deep dive into Optional class API in Java 8

We all as Java programmers been through the situation where in we invoke a method to get some value and then instead of directly invoking some methods on the return value, we first ...

DSL based approach to input Graph data in graph theory based java programs

Most of us have coded some programs which deal with graph theory algorithms like finding the shortest path between two vertices, finding the minimum spanning tree for a given graph ...

Creating External DSLs using ANTLR and Java

In my previous post quite sometime back I had written about Internal DSLs using Java. In the book Domain Specific Languages by Martin Fowler, he discusses about another type of DSL ...

Strategy Pattern using Lambda Expressions in Java 8

Strategy Pattern is one of the patterns from the Design Patterns : Elements of Reusable Object book. The intent of the strategy pattern as stated in the book is: Define a family of ...

Creating Internal DSLs in Java, Java 8- Adopting Martin Fowler’s approach

Currently I am reading this wonderful book on DSLs- Domain Specific Languages by Martin Fowler. The buzz around the DSLs, around the languages which support creation of DSLs with ease, ...

Factory Method pattern in Java

In my previous post about the Template Method pattern, I showed how one can leverage lambda expression and default methods. In this post I will explore about factory method pattern ...

Parsing XML using DOM, SAX and StAX Parser in Java

I happen to read through a chapter on XML parsing and building APIs in Java. And I tried out the different parser available on a sample XML. Then I thought of sharing it on my blog ...

Train Wreck Pattern – A much improved implementation in Java 8

Venkat Subramaniam at a talk today mentioned about Cascade Method pattern or Train Wreck pattern which looks something like:                   >someObject.method1().method2().method3().finalResult() Few ...

Template Method Pattern – Using Lambda Expressions, Default Methods

Template Method pattern is one of the 23 design patterns explained in the famous Design Patterns book by Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides. The intent of this ...
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