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On heap vs off heap memory usage

Overview I was recently asked about the benefits and wisdom of using off heap memory in Java. The answers may be of interest to others facing the same choices. Off heap memory is nothing ...
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Self-healing JVM

This post is an example about an application where the first solution to each and every IT problem – “have you tried turning it off and on again” – can backfire and do more ...
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Manipulating JARs, WARs, and EARs on the Command Line

Although Java IDEs and numerous graphical tools make it easier than ever to view and manipulate the contents of Java archive (JAR, WAR, and EAR) files, there are times when I prefer ...
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15 Tools Java Developers Should Use After a Major Release

The ultimate survival kit for new deployments Unlike toying around with zombie apocalypse scenarios, debating the machete versus the shotgun, troubles in Java production environments ...
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Java SE 8 new features tour: Traversing, filtering, processing collection, & methods enhancements with Lambda

In this article of the “Java SE 8 new features tour” series, we will deep dig into explanation, and exploring the code, on how to traverse the collections using lambda expression ...
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Annotations, Annotations Everywhere

Annotations became available with Java 1.5 in 2004, ten years ago. It’s hard to imagine our code without this feature. In fact, annotations were first introduced to relieve developers ...
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Java performance tuning survey results (part IV)

This is the last post in series where we analyze the results of the Java Performance Tuning Survey we conducted in October 2014. If you have not read the first posts, I recommend to ...
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Converting between Completablefuture and Observable

CompletableFuture<T> from Java 8 is an advanced abstraction over a promise that value of type T will be available in the future. Observable<T> is quite similar, but it promises ...
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Java performance tuning survey results (part III)

This is the third post in a series where we analyze the results of a survey conducted in October 2014. If you have not already done so, I recommend to start with the first two posts ...
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Need micro caching? Memoization to the rescue

Caching solves wide sort of performance problems. There are many ways to integrate caching into our applications. For example when we use Spring there is easy to use @Cacheable support. ...
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