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JUnit ExpectedException rule: beyond basics

There are different ways of handling exceptions in JUnit tests. As I wrote in one of my previous posts, my preferable way is using org.junit.rules.ExpectedException rule. Basically, ...
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Java can finally join strings

I am sure you were in a situation in which you wanted to join multiple strings. If you were using a programming language other than Java you probably used the join() function provided ...
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How HashMap works in java

Most common interview questions are “How HashMap works in java”, “How get and put method of HashMap work internally”. Here I am trying to explain internal functionality ...
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Migrating from javaagent to JVMTI: our experience

When you need to gather data from within the JVM, you will find yourself working dangerously close to the Java Virtual Machine internals. Luckily, there are ways you can avoid getting ...
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Simplifying ReadWriteLock with Java 8 and lambdas

Considering legacy Java code, no matter where you look, Java 8 with lambda expressions can definitely improve quality and readability. Today let us look at ReadWriteLock and how we ...
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Getting JUnit Test Names Right

Finding good names is one of the challanges of crafting software. And you need to find them all the time and for everything – classes, methods, variables, just to name a few. But ...
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Java 8 Friday Goodies: Lean Concurrency

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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How to monitor multiple JVM’s on a server with VisualVM

In the last article I have shown you how to start WebLogic Server with single admin and mulitiple managed servers. After those are started, how do you go check their health status? ...
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NetBeans IDE 8.0 and new features for Java 8

NetBeans IDE 8.0 is released, also providing new features for Java 8 technologies. It has code analyzers and editors for working with Java SE 8, Java SE Embedded 8, and Java ME Embedded ...
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Java 8 functional interfaces – random musings implementing a Scala type

In one of the assignments of the Functional programming with Scala course a type called Terrain is introduced – Terrain represents a region parts of which are accessible and ...
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