Trying to use default modifier (requires java8+) in an annotated interface yields an error

I am a beginner using spring, I am trying to use default modifier (requires java8+) in an annotated interface. but I am getting an error default modifier is not aloud here does anyone familiar with this issue ? is something todo with spring version or with spring in general ?
I am using springBootVersion=2.1.16.RELEASE

Edit:
I cannot remove the annotation because more annotations involved

@//other annotations
@Documented
public @interface Foo {
    public default String fooName() {
        return this.getClass().getName();
    }
}

> java: modifier default not allowed here

The default method is applicable only for the interface. This feature was introduced as part of Java 8 release.

Here you are trying to add default method to annotations, but the default method is not supported for annotation. Due to this, you are getting error.

Ideally, annotations are used in java to pass the meta-data for a particular class, method or files. So in a normal scenario, your annotation should not contain the concrete method with the body.

If you are trying to create an interface with a default method than remove the @.

public interface Foo {
    public default String fooName() {
        return "foo";
    }
}

Or if you are trying to create an annotation then it should not be default method and remove default keyword and the method body.

public @interface Foo {
    public String fooName();
}