Objects.requireNonNull(T obj) instead of null checks and manually thrown IllegalArgumentException?

Question

Whenever I had to check if the given parameters to a method are not null, I used to write a null check and throw a IllegalArgumentException if the null check fails:

Answer 1

Using Objects.requireNonNull(c) is a very elegant way to check if the element is not null. But there is an interesting discussion about whether choosing NullPointerException or IllegalArgumentException --> IllegalArgumentException or NullPointerException for a null parameter?. So throwing NullPointerException is the java way to express that a reference is null.

Otherwise, you can make your own method requireNotNull(). It is simple :

 public static  T requireNonNull(T obj) {
        if (obj == null)
            throw new NullPointerException();
        return obj;
    }

and you can change the exception NullPointerException by IllegalArgumentException.