Java custom functional interface method
- PHPzforward
- 2023-05-21 08:49:061001browse
Explanation
An interface that only contains abstract methods is called a function interface.
1. The object of this interface can be created through Lambda expression. That is, if it is a non-runtime exception, the exception needs to be declared through the abstract method of the target interface).
2. You can use the @functionalinterface comment on an interface to check whether it is a functional interface. Additionally, the javadoc contains a statement indicating that the interface is a functional interface.
Examples
@FunctionalInterface
public interface MyInterface {
void method1();
}
What collection classes are there in Java
Collections in Java are mainly divided into four categories:
1, List List: ordered, repeatable;
2, Queue queue: ordered, repeatable;
3, Set collection: non-repeatable;
4, Map mapping: unordered, unique keys, non-unique values.
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