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HashMap performance improvements in Java 8

HashMap<K, V> is fast, versatile and ubiquitous data structure in every Java program. First some basics. As you probably know, it uses hashCode() and equals() method of keys to ...
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Handy New Map Default Methods in JDK 8

The Map interface provides some handy new methods in JDK 8. Because the Map methods I cover in this post are implemented as default methods, all existing implementations of the Map ...
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Clean Synchronization Using ReentrantLock and Lambdas

Recently I was reading an informative post about the differences between synchronized vs ReentrantLock by Javin Paul1. He emphasises on the advantages of the latter, but does not withhold ...
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Java 8 LongAdders: The Right Way To Manage Concurrent Counters

I just lOvE new toys, and Java 8 has a bunch of them. This time around I want to talk about one of my favourites – concurrent adders. This is a new set of classes for managing counters ...
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10 JDK 7 Features to Revisit, Before You Welcome Java 8

It’s been almost a month Java 8 is released and I am sure all of you are exploring new features of JDK 8. But, before you completely delve into Java 8, it’s time to revisit ...
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Programmatic Access to Sizes of Java Primitive Types

One of the first things many developers new to Java learn about is Java’s basic primitive data types, their fixed (platform independent) sizes (measured in bits or bytes in terms ...
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Hi there . . ! How would you rate your Java/Java EE skills?

To know, is to know that you know nothing. That is the meaning of true knowledge. Socrates This post is to provide the reader with a quick overview of the Java ecosystem and it’s ...
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We’re Hacking JDBC, so You Don’t Have To

We love working with JDBC Said no one. Ever. On a more serious note, JDBC is actually a very awesome API, if you think about it. It is probably also one of the very reasons Java has ...
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Coloring Different Data Sources in IntelliJ IDEA

The database plugin in IntelliJ IDEA is a useful tool to work with data in databases. As long as we got a JDBC driver to connect to the database we can configure a data source. And ...
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Maven and Java multi-version modules

Introduction Usually, a project has a minimum Java version requirement and that applies to all of its modules. But every rule has its exceptions, as recently I stumbled on the following ...
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