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Home/ Questions/Q 6993519
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T19:46:30+00:00 2026-05-27T19:46:30+00:00

In terms of best practices, which methodology is preferred for creating a deep copy

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In terms of “best practices”, which methodology is preferred for creating a “deep copy” of an object?

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  1. Editorial Team
    Editorial Team
    2026-05-27T19:46:31+00:00Added an answer on May 27, 2026 at 7:46 pm

    Use a copy constructor. Cloneable is a straight-up API disaster. See Effective Java Item 10 (Item 11 in the 2nd. ed.).

    Item 11: Override clone judiciously

    The Cloneable interface was intended as a mixin interface (item 18) for objects to advertise that they permit cloning. Unfortunately, it fails to serve this purpose. Its primary flaw is that it lacks a clone method, and Object‘s clone method is protected. You cannot, without resorting to reflection (Item 53), invoke the clone method on an object merely because it implements Cloneable. Even a reflective invocation may fail, as there is no guarantee that the object has an accessible clone method.

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