【Java__注解】基础复习

注解

package sys.test;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Retention(RetentionPolicy.RUNTIME)
public @interface Foo {
    String[] value();

    boolean bar();
}

package sys.test;

import java.util.Arrays;

@Foo(value = {"aaa", "vvv"}, bar = true)
public class Demo {
    public static void main(String[] args) {
        Foo annotation = Demo.class.getAnnotation(Foo.class);
        System.out.println(Arrays.toString(annotation.value()));
        System.out.println(annotation.bar());
    }
}