What is functional Interfaces in java 8
What is functional Interfaces in java 8
The term Java functional interface was introduced in Java 8. A functional interface in Java is an interface that contains only a single abstract (unimplemented) method. A functional interface can contain default and static methods which do have an implementation, in addition to the single unimplemented method.
Here is a Java functional interface example:
public interface MyFunctionalInterface {
public void execute();
}
The above counts as a functional interface in Java because it only contains a single method, and that method has no implementation. Normally a Java interface does not contain implementations of the methods it declares, but it can contain implementations in default methods, or in static methods. Below is another example of a Java functional interface, with implementations of some of the methods:
#java #minoractivity
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