What makes generics useful for reducing duplicate code in Java or C#?

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What makes generics useful for reducing duplicate code in Java or C#?

Asked on Nov 20, 2025

Answer

Generics in Java and C# allow developers to create classes, interfaces, and methods with a placeholder for types, enabling code reuse and reducing duplication by allowing the same code to operate on different data types. This leads to more maintainable and type-safe code, as it eliminates the need for casting and provides compile-time type checking.

Example Concept: Generics enable type parameterization, allowing developers to define a class or method with a type parameter (e.g., ). This means the same implementation can be used for different data types without rewriting the code. For example, a generic List can store any type of object, ensuring type safety and reducing the need for multiple type-specific implementations.

Additional Comment:

Generics improve code readability by abstracting type details.
They help prevent runtime errors by catching type mismatches at compile time.
Generics are widely used in collections frameworks, such as Java's Collections API and C#'s System.Collections.Generic.

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