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Java Interview Reference Guide – Part 1

JAVA Object Oriented Concepts Java in based on Object Oriented concepts, which permits higher level of abstraction to solve any problem in realistic way. Object oriented approach conceptualize ...
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Java, Scala, Guava and Trove Collections – How Much Data Can They Hold?

 One of the fascinating things about our data structures is that even though we’re so familiar with them, it’s still hard for us to tell exactly how many items something as basic ...
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Java memory model is back

The Java memory model has been forgotten for more than nine years, but most open source Java supporters want to modernize it and focus on concurrency, as introduced in Java memory model ...
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Which is better option: Cloning or Copy constructors?

Here is how I started writing this article. I have read this statement so many times: “Cloning becomes difficult when the object has references to mutable final fields.” And every ...
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Java 8 Friday Goodies: The New New I/O APIs

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. We have blogged ...
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Implementing dynamic proxies – a comparison

Sometimes there is the need to intercept certain method calls in order to execute your own logic everytime the intercepted method is called. If you are not within in Java EE’s CDI ...
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Using regex to hanging indent a paragraph in Java

This post shows how to hanging indent a long paragraph using regular expression. The method will consider word boundaries, which means it will not break words for the indentation. To ...
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sun.misc.Unsafe and off heap memory

The class sun.misc.Unsafe allows you to many of the things you shouldn’t be able to do in Java, but are still useful in very specific cases. It is to be avoided 99% of the time, ...
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How to estimate memory consumption?

This story goes back at least a decade, when I was first approached by a PHB with a question “How big servers are we going to need to buy for our production deployment”. The new ...
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Java 8 Friday Goodies: Lambdas and XML

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. We have blogged ...
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