Using Oracle AQ via Java 8 Streams

One of the most awesome features of the Oracle database is Oracle AQ: Oracle Database Advanced Queuing. The AQ API implements a full fledged, transactional messaging system directly in the database. In a classic architecture where the database is at the center of your system, with multiple applications (some of which written in Java, others … Continue reading Using Oracle AQ via Java 8 Streams

How to Use Java 8 Streams to Swiftly Replace Elements in a List

Imagine you have a list of items: List<String> books = Arrays.asList( "The Holy Cow: The Bovine Testament", "True Hip Hop", "Truth and Existence", "The Big Book of Green Design" ); (Don't judge me. Books from this random book generator) Now you'd like to create a new list where the third item only is replaced by … Continue reading How to Use Java 8 Streams to Swiftly Replace Elements in a List

When the Java 8 Streams API is not Enough

Java 8 was - as always - a release of compromises and backwards-compatibility. A release where the JSR-335 expert group might not have agreed upon scope or feasibility of certain features with some of the audience. See some concrete explanations by Brian Goetz about why ... ... "final" is not allowed in Java 8 default … Continue reading When the Java 8 Streams API is not Enough

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 Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: 10 Subtle Mistakes When Using the Streams API

Three-State Booleans in Java

Every now and then, I miss SQL's three-valued BOOLEAN semantics in Java. In SQL, we have: TRUE FALSE UNKNOWN (also known as NULL) Every now and then, I find myself in a situation where I wish I could also express this UNKNOWN or UNINITIALISED semantics in Java, when plain true and false aren't enough. Implementing … Continue reading Three-State Booleans in Java

Java 8 Friday: No More Need for ORMs

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 Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: No More Need for ORMs

Java 8 Friday: The Dark Side of Java 8

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 Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: The Dark Side of Java 8

Java 8 Friday: Optional Will Remain an Option in Java

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 Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: Optional Will Remain an Option in Java

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 a couple of times about some nice Java 8 goodies, and now we feel it's time to start a new blog series, the... … Continue reading Java 8 Friday Goodies: Lean Concurrency

Does Java 8 Still Need LINQ? Or is it Better than LINQ?

LINQ was one of the best things that happened to the .NET software engineering ecosystem in a long time. With its introduction of lambda expressions and monads in Visual Studio 2008, it had catapulted the C# language way ahead of Java, which was at version 6 at the time, still discussing the pros and cons of … Continue reading Does Java 8 Still Need LINQ? Or is it Better than LINQ?