A user-defined copy constructor is generally needed when an object owns pointers or non-shareable references, such as to a file , in which case a destructor and an assignment operator should also be written (see Rule of three).
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Advantages of Copy Constructor in Java The Copy constructor is easier to use when our class contains a complex object with several parameters . Whenever we want to add any field to our class, then we can do so just by changing the input to the constructor.
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