java basics
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Core Java
Verify Java Interface contract using JUnit
Java interfaces define contracts that classes implementing those interfaces must adhere to. It ensures consistency and interoperability among different implementations.…
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Core Java
Get File Extension From MIME Type in Java
A MIME type categorizes internet data by type and format. It can be linked to various file extensions, indicating compatibility.…
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Core Java
Java Map putIfAbsent vs computeIfAbsent
A frequently employed data structure, the Map stores key-value pairs. Java provides several methods for managing entries within a Map.…
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Core Java
HashMap to ArrayList In Java
In Java programming, converting HashMap values into an ArrayList is a common operation when transitioning between data structures. Let us…
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Core Java
Skip First Iteration in Java
Iterating serves as a fundamental aspect of programming, empowering developers to navigate and manipulate data structures with ease. Nonetheless, circumstances…
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Core Java
Java Arrays & Collections Sort Methods
Sorting in Java is a crucial aspect of programming, systematically enabling the organization of data. Let us delve into understanding…
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Core Java
Converting Excel Data Into a List Of Java Objects
Understanding data mapping holds significant importance in software development. Given Excel’s widespread usage in data management, Java developers must learn…
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Core Java
Check if String Contains Only Letters & Numbers
Ensuring that a string adheres to business rules is fundamental for the functionality of many applications. Frequently, we must verify…
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Core Java
Value-Based Classes in Java
In Java 8, value-based classes represent immutable data structures with defined value equality, crucial for functional programming paradigms. With Java…
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Core Java
Java Double vs. BigDecimal
The decision between using double and BigDecimal in Java can have a substantial effect on both the performance and the…
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