A quick and practical guide to escaping HTML symbols in Java.

Java requires all code to be in classes. Sometimes we may need to create an object with no state in order to help achieve a design pattern. We look at stateless objects and how they function.

Explore common causes like incorrect library names, missing directory specifications, and incompatible architectures. Implement solutions such as setting java.library.path and using proper classloaders to resolve this error effectively.

Learn the remove() then put() approach to replacing a key in a Java HashMap.

Explore different string concatenation methods in Java and evaluate their performance using JMH.

Learn how to get the start and end dates of a year using the modern Date Time API and the old Calendar and Date classes.

The Java Garbage Collector plays a part in managing the memory of the metaspace, where information about classes is stored. We look at tuning parameters to help the JVM manage our application.

Soft delete in JPA, Kotlin 1.9, platform teams, sliced onion architecture, and stream processing!

Discover the difference between Future, CompletableFuture, and Rxjava’s Observable.

Testcontainers, VisualVM profiling, project Leyden, virtual threads, magnificent S3, and GenAI!

Learn how to quickly convert from relative to absolute paths in Java.

Explore two distinct approaches, focusing on using a custom annotation and Reflections, for identifying and registering subtypes.

Learn a few ways to remove duplicate values from a Java HashMap.

Learn multiple approaches to converting an int[] to a HashSet in Java.

Learn how to use Java's Iterator and ListIterator and explore the key differences between them.

Learn how to get the first item from a Java Set.

A quick and practical guide to converting String or String Array to Map in Java.

We previously built a Java application on a Neo4j graph database. Now we can take this further by exploring custom queries and projections.

JVM computed constants, safepoints, Maven vs Gradle battle, GC improvements, bulk SQL, and effective technology strategies. A good week.

Java's new yield keyword makes it easier to provide a returned result from switch statements. We look at how it works and how it can help ensure we cover all possible cases.

Learn two different ways to convert time from the 12-hour time format to the 24-hour time format in Java.