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This article introduces the knowledge of "how to use the default method of java interface". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Format of the default method in the API:

Public default returns value type method name (parameter list) {}

Considerations for the default method in the interface:

2. The default method is not abstract, so it is not overridden. But you can rewrite, and when you rewrite, you can delete keywords.

Public can be omitted, but default cannot be omitted.

Example

1: define an interface MyInterface, in which there are two abstract methods: void show1 (); void show2 (); 2: define two implementation classes of the interface: MyInterface ImplOneMyInterface ImplTwo3: define the test class: MyInterfaceDemo in the main method, create objects in a polymorphic way and use the "java interface how to use the default method" content here, thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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