Why should one use Objects.requireNonNull()?

public class Foo {
  private final Bar bar;

  public Foo(Bar bar) {
    Objects.requireNonNull(bar, "bar must not be null");
    this.bar = bar;
  }
}

The major advantages are:

• as said, controlled behavior
• easier debugging - because you throw up in the context of the object creation. At a point in time where you have a certain chance that your logs/traces tell you what went wrong!
• and as shown above: the true power of this idea unfolds in conjunction with final fields. Because now any other code in your class can safely assume that bar isn’t null - and thus you do not need any if (bar == null) checks in other places!

개인적으로 세 번째가 가장 큰 장점이라 생각된다.

[출처]
Why should one use Objects.requireNonNull()?