copy an array list to another array list code example

Example: copy arraylist to another arraylist java

You can use such trick:

myObject = new ArrayList<Object>(myTempObject);
or use

myObject = (ArrayList<Object>)myTempObject.clone();
You can get some information about clone() method here

But you should remember, that all these ways will give you a copy of your List, not all of its elements. So if you change one of the elements in your copied List, it will also be changed in your original List.