What Does the Holder<T> Class Do in Java?

Date: 2023-10-05

A Java Holder class, not a standard part of the language, is a custom class used to encapsulate and hold another object. It's crucial because Java uses pass-by-value, meaning copies of variables are passed to methods, limiting modification of the original. A Holder class, using generics, overcomes this by allowing objects to be passed by reference, enabling modification without changing the reference itself. It provides getValue() and setValue() methods for object access. This makes it a versatile tool for various programming scenarios and design patterns.

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