Java
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1.x to 2.x migration: Observable vs. Observable: RxJava FAQ
The title is not a mistake. rx.Observable from RxJava 1.x is a completely different beast than io.reactivex.Observable from 2.x. Blindly upgrading rxdependency and renaming all…
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What is javax.ws.rs.core.context? [ Part 1 ]
How to use the @Context annotation The JAX-RS API provides a very handy mechanism to inject a range of useful resources,…
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Concourse caching for Java Maven and Gradle builds
Concourse CI 3.3.x has introduced the ability to cache paths between task runs. This feature helps speed up tasks which cache content…
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How to convert a lambda expression to method reference in Java 8?
If you have been coding in Java 8 then you know that using method reference in place of lambda expression…
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How to create a thread-safe ConcurrentHashSet in Java 8?
Until JDK 8, there was no way to create a large, thread-safe, ConcurrentHashSet in Java. The java.util.concurrent package doesn’t even…
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Java Command-Line Interfaces (Part 11): CmdLn
This post describes using Ostermiller Java Utilities 1.08.02‘s CmdLn (Java Command Line Parser) to process command-line arguments from Java-based applications.…
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What is private in Java 9?
When doing interviews I experience that most of the candidates do not know what private modifier in Java really means.…
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How to format/parse dates with LocalDateTime in Java 8 – Example Tutorial
One of the common tasks in Java project is formatting or parsing date to String and vice-versa. Parsing date means…
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Getting to know about java.nio.file.Path – 1
Introduction The last few released of Java namely Java 7, Java 8 and the upcoming Java 9 have quite a…
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