Methods of implementing classes ArrayList and LinkedList of Java collection

List of methods for list

The following is a simple example:

Implementation class ArrayList

Implementation class LinkedList

The linked list implementation of the list interface implements all optional list operations and allows all elements (including null). In addition to implementing the list interface, the LinkedList class also provides a unified naming method for get, remove and insert elements at the beginning and end of the list. These operations allow the linked list to be used as a stack, queue, or double ended queue.

Some methods of LinkedList

Traversal of sets

As mentioned in the above example, let's look at the code

Using the for loop

Use the for - each loop

Using the iterator interface

Each collection class provides an iterator method to return an iterator. Through this iterator, you can complete the traversal or deletion of the collection. The use steps of the iterator are as follows:

****

1. Obtain the iterator of the set through the iterator method

2. Determine whether the next element exists by calling the hasnext method

3. Use the next method to remove its next element

The method of implementing ArrayList and LinkedList in the above Java collection is all the content shared by Xiaobian. I hope it can give you a reference and support more programming tips.