Core Java
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Objenesis Hello World Example
In Java, object instantiation typically involves invoking a constructor using the new keyword or reflective instantiation via Constructor.newInstance(). However, these…
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Rate Limiting in Java: Implementing Per-User Throttling with Redis Buckets
To protect APIs from abuse and ensure fair usage, rate limiting is essential. It prevents users or clients from overwhelming…
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How to Use Avro to Serialize and Deserialize Dates
Working with dates and timestamps in data serialization can be tricky, especially when consistency and precision matter. Avro, a popular…
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GitHub Access with Java
The GitHub API enables developers to programmatically interact with GitHub’s services. Using the github-api Java client library (developed by Kohsuke…
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How to Use Java 21’s Virtual Threads in Real-World Web Applications
With the release of Java 21, virtual threads — part of Project Loom — are now stable and production-ready. This…
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Running Java Apps on AWS Lambda with SnapStart: Is It Production-Ready Yet?
Running Java applications on AWS Lambda has always faced one major challenge: cold starts. Especially when using Spring Boot, startup…
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@Context Complex Source Mappings Example
1. Introduction The org.mapstruct.Context annotation from MapStruct, a Java annotation processor for generating type-safe bean mapping code, marks a parameter…
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Running Java Programs in the Background
Running a Java program in the background is crucial for keeping applications or services active even after terminal sessions end.…
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Fixing Java DateTimeParseException with LocalDateTime
When working with Java’s java.time package, we sometimes encounter the DateTimeParseException with the message:“Unable to obtain LocalDateTime from TemporalAccessor”.This error…
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