Core Java
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Jackson and Lombok Examples
1. Introduction Jackson is an open-source java library for processing JSONs. It deserializes a JSON string into a Plain Old…
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Map Subset of JSON via Jackson
1. Introduction JavaScript Object Notation (JSON) is a text-based data format and widely used in the APIs for exchanging data…
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Fixing Ambiguous Method Call Errors in Mockito
In Java, method overloading allows a class to have multiple methods with the same name but different parameter lists. However,…
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Building Secure REST APIs with Javalin and JWT
REST APIs are the backbone of modern web applications, but securing them can be a complex task. Javalin, with its…
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Extract the Common Name (CN) from an X509 Certificate in Java
The Common Name (CN) is a critical field within an X509 certificate that identifies the entity owning the certificate. In…
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Conquering Errors in Java Lambdas
Java lambdas, with their concise syntax and focus on functionality, have revolutionized Java programming. But what happens when things go…
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Guide to ExecutorService vs. CompletableFuture
Modern applications often require efficient handling of concurrent tasks to improve performance and responsiveness. Java provides robust concurrency utilities, such…
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Beyond SAX and DOM: Modern XML Querying in Java
Java applications rely heavily on XML for structured data exchange. But traditional methods like SAX and DOM can make XML…
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Mastering Java’s Executor Framework
In the fast-paced world of modern applications, efficiency is key. Often, tasks need to run concurrently to avoid bottlenecks and…
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