How to apply Single annotation on multiple variables?

Question

I am rookie in Java Annotation and have been searching for applying single annotation on multiple variable simultaneously.

Code:

Answer 1

@NotNull annotation can be applied at element not at group of elements.

JavaDoc: The annotated element must not be null. Accepts any type.

If you really want to get away with boiler plate code, you can use frameworks like Lombok which can help you to certain extent.

Link : http://projectlombok.org/features/Data.html

OR you can use reflection to validate all the method.

for (Field f : obj.getClass().getDeclaredFields()) {
  f.setAccessible(true); // optional
  if (f.get(obj) == null) {
     f.set(obj, getDefaultValueForType(f.getType()));
     // OR throw error
  }
}