![]() Thanks for such and detailed explanation. ![]() Deep copy is expensive as compare to shallow copy in terms of object creation, because it involves recursive copying of data from other mutable objects, which is part of original object. ![]() If our parent object contains only primitive value then shallow copy is good for making clone of any object because in new object value is copied but if parent object contains any other object then only reference value is copied in new parent object and both will point to same object so in that case according to our need we can go for deep copy.gearbox gearbox.clone() Clone children to produce a deep copy // c.make make. In shallow copy main or parent object is copied, but they share same fields or children if fields are modified in one parent object other parent fields have automatic same changes occur,but in deep copy this is not the case. doors doors Already copied by Object.clone c.This modification is done to ensure that original and cloned object are independent to each other. HashSet hsmyfunc () I wanted to know if in this way the returned value is copied into hs, or I should write a deep copy for it or I should write. To read the returned value, I write it like this: HashMap hsmyfunc2 () I do the same if the function returns a HashSet.Therefore, it creates new objects for all keys, values, and mappings. First: I have a function which returns a HashMap. When we call Object.clone(), this method performs a shallow copy of object, by copying data field by field, and if we override this method and by convention first call super.clone(), and then modify some fields to "deep" copy, then we get deep copy of object. A deep copy of a HashMap is a new HashMap that deeply copies all the mappings.I think now we know what is deep and shallow copy of object in Java, let see some difference between them so that we can get some more clarity on them. In this tutorial, weâll look at ways of copying one HashMap onto another without replacing the keys and values of the target HashMap.
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