How to run all methods with a given annotation?

Question

This is what I want to happen:

public class MainClass {
    public static void main(String args[]) { 
        run @mod(); // run all methods annotated with @mod          


        

Answer 1

I think you can use reflection technique.

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface mod {
   public String name() default "";
}

public class Fundamental {
   public static void main(String[] args) {
      // Get all methods in order.
      // runClass is the class you declare all methods with annotations.
      Method[] methods = runClass.getMethods();
      for(Method mt : methods) {
        if (mt.isAnnotationPresent(mod.class)) {
            // Invoke method with appropriate arguments
            Object obj = mt.invoke(runClass, null);
        }
      } 
   }
}