Refactor multiple If' statements in Java-8

Question

I need to validate mandatory fields in my class

For example, 9 fields must not be null.

I need to check if they are all null but I

Answer 1

Basically, there are two ways here:

• As suggested by the comment, NonNull as offered by Project Lombok for example
• Java bean validation

I would heavily recommend to look into bean validation:

Define your classes that carry information as beans. And then use the wide range of annotations to mark the corresponding fields. And then use some existing framework to do the validation for you. You can even define your own annotations there, that run your own code.