Linked Questions

I want to make a copy of an object, then after some logic, re-assign the original object the value of the copy. example: User userCopy = //make a copy foreach(...) { user.Age = 1; user.ID = -1; ...

I first noticed this problem when I only put the objects in listOfRates and then created inverseListOfRates by copying it. But even using this method, I can't alter one list without altering the other....

I have a pretty general question about java. I want to know if there is a simple way to recreate this c++ code in java: class A { public: int first; int second; A(const A& other) { *...

I have an array and i want to create an independent copy of it. Changes in one of those should not impact the other at all. Currently everything i tried just created two references on one object. ...

How can we copy an object in java without copying the reference. If any object is present inside then we should copy the value only with out modifying the original object reference. How can this be ...

I need to know how to for loop through a Hashtable, check for cloneability on each value, and clone if possible. This Hashtable has all String keys, but the values can be of any class. I have come ...

How to deep copy hashmap? I wanna make a copy of hashmap. When I change the keys and values in the copy, the original hashmap doesn't change. I cannot find a solution to solve this problem in the ...

I'm new at Java and I came across a problem I couldn't find a solution to, so maybe somebody can help me out. When I write this code: ArrayList<String> Liste = new ArrayList<>(); String ...

I wanted to have a function that returns a copy of the object it receives, to use it somewhere else. This is what I wrote: public static PObject Instantiate(PObject obj) { PObject other = obj; ...

How can I clone an ArrayList and also clone its items in Java? For example I have: ArrayList<Dog> dogs = getDogs(); ArrayList<Dog> clonedList = ....something to do with dogs.... And I ...

I'm wondering if there is a recommended way of doing deep clone/copy of instance in java. I have 3 solutions in mind, but I can have miss some, and I'd like to have your opinion edit: include Bohzo ...

I have some data structures, and I would like to use one as a temporary, and another as not temporary. ArrayList<Object> myObject = new ArrayList<Object>(); ArrayList<Object> ...

Is there any utility for deep cloning for java collections: Arrays Lists Maps NOTE: prefer some solution without usage of serialization, but with use of Object.clone() method. I can be sure that my ...

The error I get from the compiler is "The left hand side of an assignment must be a variable". My use case is deep copying, but is not really relevant. In C++, one can assign to *this. The ...

How can I deep copy an irregularly shaped 2D array in Java? Ie. int[][] nums = {{5}, {9,4}, {1,7,8}, {8,3,2,10}} I'm unable to use Arrays....