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Difference between Abstract Class and Interface in java

Some of the popular interview questions are “What are the differences between abstract class and interface”, “When will you use abstract class and when will you use ...
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Better error messages with Bean Validation 1.1 in Spring MVC application

Bean Validation 1.1, among many new features, introduced error message interpolation using Unified Expression Language (EL) expressions. This allows to define error messages based on ...
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Java EE7 and Maven project for newbies – part 6

Resuming from the previous parts Part #1, Part #2, Part #3, Part #4, Part #5 In the previous post (part 5), we discovered how we can unit test using Arquillian, our EJB services, ...
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Spring Boot: Fast MVC start

I was planning to write an article about Spring Boot more than a year ago. Finally I have the time and inspiration for this. So prepare yourself for 10 – 15 minutes of high quality ...
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A little bit on the JVM and JIT

As you might be aware, the JVM (Java Virtusal Machine) is what makes it possible for Java to adhere to the write-once-run-anywhere paradigm. At its core, the JVM consists of the following ...
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MineCraft and off heap memory

Overview MineCraft is a really good example of when off heap memory can really help.The key requirements are:The bulk of the retained data is a simple data structure (in minecraft’s ...
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Java Build Tools: Ant vs Maven vs Gradle

In the beginning there was Make as the only build tool available. Later on it was improved with GNU Make. However, since then our needs increased and, as a result, build tools evolved. JVM ...
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Java SE 8 new features tour: The Big change, in Java Development world

I am proudly one of the adopt-OpenJDK members like others professional team members but joined from last 8 months, and we went through all stages of Java SE 8 development, compilations, ...
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A Tour Through elasticsearch-kopf

When I needed a plugin to display the cluster state of Elasticsearch or needed some insight into the indices I normally reached for the classic plugin elasticsearch-head. As it is recommended ...
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Java 8 Friday: 10 Subtle Mistakes When Using the Streams API

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. Java 8 Friday Every ...
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