Java
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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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flatMap() and the order of events – RxJava FAQ
As we already discovered, flatMap() does not preserve the order of original stream. Let’s illustrate this using the GeoNames API example from previous article: public…
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Application Network Functions With ESBs, API Management, and Now.. Service Mesh?
I’ve talked quite a bit recently about the evolution of microservices patterns and how service proxies like Envoy from Lyft…
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Java Command-Line Interfaces (Part 10): picocli
The main picocli page describes picocli as “a mighty tiny command line interface” that “is a one-file Java framework for…
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RAII in Java
Resource Acquisition Is Initialization (RAII) is a design idea introduced in C++ by Bjarne Stroustrup for exception-safe resource management. Thanks…
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flatMap() vs. concatMap() vs. concatMapEager() – RxJava FAQ
There are three, seamlessly similar operators in RxJava 2.x: flatMap(), concatMap() and concatMapEager(). All of them accept the same argument – a function from…
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Eager subscription – RxJava FAQ
While teaching and mentoring RxJava, as well as after authoring a book, I noticed some areas are especially problematic. I decided…
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