java - ArrayList - How to modify a member of an object?

Question

I have a number of Customer objects stored in an ArrayList. My Customer class has 2 data members: Name and Email. Now I want to modify just the Email for Customer "Doe".

Now if "Doe" is located at index 3 in the list, I know I can write this line:

myList.set( 3, new Customer( "Doe", "j.doe@supermail.com" ) );

But that means creating a new object. If I have a very big list, I suppose the process would be very slow. Is there any other way to directly access the data member of an Object stored in an ArrayList, maybe by using another kind of Collection than ArrayList?

question from:https://stackoverflow.com/questions/10053078/arraylist-how-to-modify-a-member-of-an-object

Answer 1

You can do this:

myList.get(3).setEmail("new email");