Java
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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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Using @ConcreteProxy in Hibernate
Hibernate is a powerful ORM framework, but its use of proxies for lazy loading can sometimes lead to subtle and…
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Monads Unmasked: The Category Theory You’re Already Using Without Knowing
Mention “monads” to most developers and watch their eyes glaze over. The term carries baggage: intimidating mathematical jargon, abstract category…
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How to Reset and Reuse InputStream
In Java, InputStream is commonly used to read data from files, network sockets, or in-memory buffers. A frequent requirement is…
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Go’s Error Handling: Why Explicit Beats Exceptions (According to Google)
Few design decisions in programming languages spark as much debate as Go’s approach to error handling. Open any Go codebase…
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Inserting BLOB Using Spring JdbcTemplate Example
1. Introduction BLOB (Binary Large Object) is a large object data type in the database system. BLOB could store documents,…
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Jackson MongoDB POJO Mapping Example
In Java-based applications using MongoDB, converting data between MongoDB’s native document representation and Java Plain Old Java Objects (POJOs) is…
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Java’s Checked Exceptions: The 20-Year Experiment That Failed
In 1996, Java introduced a bold experiment: checked exceptions. The compiler would force developers to handle errors, making software more…
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Spring Data JPA save() Method Explained
In Spring Data JPA, the save() method is commonly used to persist or update entities. A frequent misconception is that…
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