UseCase.java

package ch20annotation.sample;//: annotations/UseCase.java

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

/**
 * 元注解：专职于负责注解其他的注解
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface UseCase {
    public int id();

    public String description() default "no description";
} // /:~