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Today, I would like to share with you the relevant knowledge points about the method of java custom functional interface. The content is detailed and 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 get something after reading this article.

Description

An interface that contains only abstract methods is called a function interface.

1. You can create objects for this interface through Lambda expressions. That is, a non-runtime exception, the exception needs to be declared through the abstract method of the target interface.

2. You can use @ functionalinterface comments on an interface to check whether it is a functional interface. In addition, the javadoc contains a declaration indicating that the interface is a functional interface.

Example

@ FunctionalInterfacepublic interface MyInterface {void method1 ();} what are the collection classes in Java? the collections in Java are mainly divided into four categories:

1. List list: ordered and repeatable

2. Queue queue: orderly and repeatable

3. Set collection: non-repeatable

4. Map mapping: unordered, key unique, value not unique.

These are all the contents of this article entitled "java Custom functional 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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