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Today, the editor will share with you the relevant knowledge points about how to define and implement the java interface. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

The operating environment of this tutorial: windows7 system, java10 version, DELL G3 computer.

1. Concept

Use interface to define the interface. Classes similar to interface definitions are divided into interface declarations and interface questions, where interfaces are composed of constant definitions and method definitions.

A class requires that the class implements one or more interfaces using the keyword implements in the class declaration.

2. Format of definition

Public interface interface name {Abstract method 1; Abstract method 2; Abstract method 3;.}

3. An example of interface implementation

Package com.dao.util; public class Util {public interface Worker {void work ();}} package com.dao.util; import com.dao.util.Util.Worker; public class Demo implements Worker {public void work () {System.out.println ("Is working");}}

When it comes to interfaces, we often use methods to invoke them in java. For beginners, we need to master the method of interface definition. This article explains the concept and definition format of interface, and then brings examples of interface.

These are all the contents of the article "how to define and implement the java Interface". 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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