The capacity of an ArrayList functions differently to the size of an Array. We explore the differences and when it’s a good idea to set an ArrayList’s size.
Here's what I've written (so far):
Performance Difference Between save() and saveAll() in Spring Data
Filed under Persistence, Spring Data
1. Overview In this quick tutorial, we’ll learn about the performance difference between save() and saveAll() methods in Spring Data. 2. Application In order to test the performance, we’ll need a Spring application with an entity and a repository. Let’s create a book entity: @Entity public class Book { @Id @GeneratedValue(strategy = GenerationType.AUTO) private long […]
Creating a Generic Array in Java
Filed under Java Collections
The loose types of Java generics are hard to coerce into the strong types of Java arrays. We explore the problem and some common solutions.
Reusing Docker Layers with Spring Boot
In this tutorial, we’ll see how to exploit the new capabilities of Spring Boot to reuse Docker layers.
Java Weekly, Issue 360
Filed under Weekly Review
Meet Spring Boot 2.4, Embracing subatomic Java, Catching up with the new Java features, and a set of practical guides on distributed systems.
Defining Indexes in JPA
Filed under Persistence
Learn how to implement and use indexes using JPA.
Maven Packaging Types
Filed under Maven
In this article, we explore the different packaging types available in Maven.
DispatcherServlet and web.xml in Spring Boot
Filed under Spring Boot, Spring Web
Learn how to migrate code from a web.xml file to DispatcherServlet in a Spring Boot application.
Java Weekly, Issue 359
Filed under Weekly Review
All things Reactive: R2DBC joins Reactive Foundation, Reactive Manifesto II, and The Reactive Principles. NUMA meets G1, GraphQL at scale, and write angry!
JPA CascadeType.REMOVE vs orphanRemoval
Filed under Persistence
Learn about the difference between JPA CascadeType.REMOVE and orphanRemoval for deleting entities.
Sealed Classes and Interfaces in Java 15
Filed under Java
Explore explored sealed classes and interfaces, a preview feature in Java SE 15.
Ignoring Fields With the JPA @Transient Annotation
Filed under Persistence
Learn how to ignore fields using the JPA @Transient annotation in Java.
Localizing Exception Messages in Java
Filed under Java
Learn how to use the getLocalizedMessage() method to provide localized exception messages
Java IndexOutOfBoundsException “Source Does Not Fit in Dest”
Filed under Java, Java Collections
Learn about the IndexOutOfBoundsException: “Source does not fit in dest” in Java.
Check if a Java Program Is Running in 64-Bit or 32-Bit JVM
Filed under Java
Learn how a Java program can detect whether it’s running in a 64-bit or 32-bit JVM.
Java (String) or .toString()?
Filed under Java
Learn about the differences between String casting and executing the toString() method in Java.
Java Weekly, Issue 358
Filed under Weekly Review
2 million virtual threads with Loom, reactive to coroutines, cloud-native Spring Boot, working effectively with databases and context matters!
The transient Keyword in Java
Filed under Java
Learn about the transient keyword and see its behavior through examples
Understanding the & 0xff Value in Java
Filed under Java
Learn how to use the 0xff value with the bitwise AND operator in Java.
Apache Commons Collections vs Google Guava
Filed under Guava, Java Collections
Explore the functionality offered by Apache Commons and Google Guava, specifically in the area of the collections framework.
