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Today, I would like to share with you what are the contents of the Java List interface and how to use the relevant knowledge points, the content is detailed, the logic is clear, I believe most people still know too much about this knowledge, so share this article for your reference, I hope you can learn something after reading this article, let's take a look at it.

Preface

The List interface is one of the three major interfaces of the Collection interface, in which the data can be retrieved through the location, and the user can insert the data at the specified location. The data for List can be empty and can be repeated.

First, the unique method of List

We only focus on different approaches from Collection here, mainly as follows:

/ / inserts the specified collection into the current collection boolean addAll (int index, Collection) o. ListIterator (); while (e1.hasNext () & & e2.hasNext ()) {Eo1 = e1.next (); Object O2 = e2.next (); / / the equals method if (! (o1==null?) of the data element is used here. O2==null: o1.equals (O2)) return false;} return! (e1.hasNext () | | e2.hasNext ());} public int hashCode () {int hashCode = 1; for (E: this) / / the hashCode method hashCode = 31*hashCode + (e==null? 0: e.hashCode ()) of the data element is used here; return hashCode } these are all the contents of the article "what is the content of the Java List interface and how to use it?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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