This question already has answers here: Why does my ArrayList contain N copies of the last item added to the list?
When I learned Java, I was told that the arraylist works this way: It creates an array with room for 10 elements.
Is there a way to get the type of object in the arraylist? I need to make an IF statment as the following (in C#):
I\'m refatoring a home-grown开发者_开发百科 DAO container, hoping to make the class generic. It internally uses an ArrayList to store the retrieved objects.
I\'m working on a program that uses an ArrayList to store Strings. The program prompts the user with a menu and allows the user to choose an operation to perform. Such operations are adding Strings to
Okay at first I thought this would be pretty straightforward. But I can\'t think of an efficient way to solve this. I figured a brute force way to solve this but that\'s not very elegant. I have an Ar
I have an ArrayList that I want to use to hold RaceCar objects that extend the Thread class as soon as they are finished executing. A class, called Race, handles this ArrayList using a callback method
In Java, how can you make an ArrayList read-only (so that no one can add elements, edit, or delete elements) after init开发者_如何学Pythonialization?Pass the ArrayList into Collections.unmodifiableLis
How would you explain to someone开发者_C百科 who has just started programming in Java, what the difference between ArrayLists and Iterators are?
Many people and authors suggested to us to use list than array. List <Integer> list = new ArrayList<Integer>();
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