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Core Java

Kotlin’s Null Safety: How to Fix Java’s Billion-Dollar Mistake Without Breaking Everything
In 2009, computer scientist Tony Hoare apologized for inventing the null reference in 1965. He called it his “billion-dollar mistake,”…
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Enterprise Java

Project Reactor DataBuffer to Mono Example
In reactive Spring applications, especially those built with Spring WebFlux, data is often handled as streams rather than simple objects.…
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Enterprise Java

Java Commit with JdbcTemplate vs DataSource
In Spring-based Java applications, database access is commonly performed using JdbcTemplate or higher-level abstractions such as JPA. A frequent source…
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Software Development

The Paradox of Abstraction: Why Good Abstractions Make Systems Harder to Debug
Every software developer has experienced this frustrating moment: you’re tracking down a bug, and just when you think you’ve found…
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Software Development

The Attention Economy of Code Reviews: What Cognitive Psychology Says About Effective Reviews
Every pull request competes for a scarce resource: your reviewer’s attention. In an era where developers juggle multiple projects, endless…
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Core Java

Apache POI HSSFWorkbook: Read, Write, and Stream Excel
Working with Excel files is a common requirement in enterprise Java applications, whether for reporting, data exchange, or bulk uploads.…
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