Effective Java Item 35. Write own annotation and reflection

 //Almost always RUNTIME  
 @Retention(RetentionPolicy.RUNTIME)  
 @Target({ElementType.TYPE, ElementType.METHOD})  
 @interface MyTest {}  
 class Sample{  
   @MyTest  
   public static void m1(){}  
 }  
 public class MyAnnotation{  
   public static void main(String[] args){  
     Class testClass = Sample.class;  
     //Get all methods including private, protected  
     //as opposed to testClass.getMethods() only returning public methods  
     for (Method m : testClass.getDeclaredMethods()){  
       if (m.isAnnotationPresent(MyTest.class)){  
         try{  
           m.invoke(null); //Call static method  
         } catch (InvocationTargetException e) {  
           e.printStackTrace();  
         } catch (Exception e) {  
           e.printStackTrace();  
         }  
       }  
     }  
   }  
 }