Core Java
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Implement mTLS Calls in Java
Mutual TLS (mTLS) is an enhancement of TLS where both the server and the client present and validate X.509 certificates.…
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Comparison of Google Protobuf ByteString and Byte[]
Binary data is common in networked apps: images, protobuf payloads, encryption outputs, etc. When using Protocol Buffers in Java you…
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What are DTOs (Data Transfer Objects)
In enterprise-level Java development, structuring data exchange between different application layers is a critical concern. Applications typically consist of several…
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What’s New in Mockito 2025? From Java 21 Support to AI-Powered Testing
Mockito has long been the go-to mocking framework in the Java ecosystem. Whether you’re writing small unit tests or working…
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HibernateException: Illegal Collection Association Fix
In Hibernate, the exception IllegalAttemptToAssociateACollectionWithTwoOpenSessionsException occurs when a collection or entity is associated with two active Hibernate sessions simultaneously. This…
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Java Mail Inline Images in Emails Example
Sending rich emails with embedded images can significantly improve user engagement. The JavaMail API allows developers to send inline images…
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A Comprehensive Guide to Java GUI Frameworks
Java has been a cornerstone in application development for decades, and one of its enduring strengths is the ecosystem of…
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Object-Oriented Design Patterns with Java
1. Introduction Object-Oriented Design Patterns came out from software engineers recognizing recurring problems and formalizing solutions as reusable, named patterns.…
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Unleash the Power of Open Source Java Profilers: Comparing VisualVM, JMC, and async-profiler
Performance tuning in Java often feels like detective work. Applications run fine in development but slow down in production. Memory…
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