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Which Is Better List or Arraylist in Java?

James H. Sterling • • 7 min read
Which Is Better List or Arraylist in Java?
One of the most important differences between List and ArrayList is that list is an interface and ArrayList is a standard Collection class. List interface extends the Collection framework whereas, the ArrayList extends AbstractList Class and it implements List interfaces. The namespace for List interface is System.

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Herein, which is better ArrayList or list?

Array is faster and that is because ArrayList uses a fixed amount of array. Since the add from ArrayList is O(n) and the add to the Array is O(1). However because ArrayList uses an Array is faster to search O(1) in it than normal lists O(n). List over arrays.

One may also ask, what is ArrayList and list in Java? An ArrayList in Java represent a resizable list of objects. We can add, remove, find, sort and replace elements in this list. ArrayList is part of Java's collection framework and implements Java's List interface.

Considering this, is ArrayList same as list Java?

Well, the main difference between List and ArrayList is that List is an interface while ArrayList is a class. Most importantly, it implements the List interface, which also means that ArrayList is a subtype of List interface.

Why do we use ArrayList in Java?

ArrayList in Java is used to store dynamically sized collection of elements. Contrary to Arrays that are fixed in size, an ArrayList grows its size automatically when new elements are added to it. Just like arrays, It allows you to retrieve the elements by their index. Java ArrayList allows duplicate and null values.

Related Question Answers

Which is faster ArrayList or array?

An array is faster and that is because ArrayList uses a fixed amount of array. However when you add an element to the ArrayList and it overflows. It creates a new Array and copies every element from the old one to the new one.

Are arrays more efficient than lists?

Advantages of Arrays
Arrays only need to store data, so no space is wasted with pointers to other memory addresses. Because the memory for an array is in a single location, accessing it is more efficient than it is for lists, which requires random pointer jumping.
James H. Sterling
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James H. Sterling

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.