baeldung | Baeldung

Here's what I've written (so far):

Testing LDAP Connections With Java

Filed under Security

Learn how to test an LDAP server using a Java client

Java Concurrent HashSet Equivalent to ConcurrentHashMap

Filed under Java Collections, Java Concurrency

Explore different possibilities to create thread-safe Set instances and emphasized the differences between them.

How to Access EntityManager with Spring Data

Filed under Spring Data

Learn how to access the EntityManager directly when working on a Spring Data application.

Java IdentityHashMap Class and Its Use Cases

Filed under Java Collections

Learn how to use IdentityHashMap in Java

Generating a Secure AES Key in Java

Filed under Security

A quick and practical guide to generating a secure AES key in Java.

Java Weekly, Issue 421

Filed under Weekly Review

Revisiting transactional, dynamic, and partial updates, JPA flush modes, Kafka vs Chronicle, and the real cost of attrition!

Cassandra Batch in Cassandra Query Language and Java

Filed under Data

Learn about the Cassandra batch query and how to apply it in Cqlsh and Java using BatchStatement.

Get the Name of the Currently Executing Test in JUnit

Filed under Testing

Sometimes we need our unit tests to be able to access the name JUnit has allocated to them. This is especially useful when using name generators or parameterized tests. We look at how to solve this problem in both JUnit 4 and 5.

Convert a Maven Build to Gradle

Filed under Gradle, Maven

Learn how to convert a Maven build to a Gradle build.

Find All Jars Containing Given Class

Filed under Java

In this article, we’ll learn to find all the jars containing a particular class.

Hidden Classes in Java 15

Filed under Java

A quick and practical guide to Java 15’s Hidden Classes.

An Introduction to InstantSource in Java 17

Filed under Java

Learn all about the InstantSource interface introduced in Java 17. Understand what problems it addresses, and how to use it.

Java Weekly, Issue 420

Filed under Weekly Review

All about distributed systems: fault tolerant JVM, circuit breaker for RestTemplate, tracing in Spring Boot and replicated log. Also, catching errors in Java and risk of micro-dependencies!

Running a TestNG Project From the Command Line

Filed under Testing

TestNG is a unit testing library which can be run via the IDE and build tooling. We look at how to run TestNG tests directly with the command line.

Generating a Java String of N Repeated Characters

Filed under Java

Producing a string out of repeating a character or sequence can be done a variety of ways. We look at a few methods, and compare them for readability and efficiency.

Failed to Load ApplicationContext for JUnit Test of Spring Controller

Filed under Spring, Testing

Learn about the “Failed to Load ApplicationContext” error message when running Junit tests with the Spring Controller, and how to fix it.

SequenceInputStream Class in Java

Filed under Java

A quick and practical guide to Java SequenceInputStream class.

Keycloak Integration – OAuth2 and OpenID with Swagger UI

Filed under Security

Learn how to test a REST service that uses Keycloak for authentication and authorization with Swagger UI

Java Weekly, Issue 419

Filed under Weekly Review

Happy New Year 🙂
An interesting set of articles this week, from HTTP to persistence optimization and some Dilbert.

String equals() Vs contentEquals() in Java

Filed under Java

Learn the differences between the equals() and the contentEquals() methods of the String class in Java using practical examples.