What is the preferred Throwable to use in a private utility class constructor?

Question

Effective Java (Second Edition), Item 4, discusses using private constructors to enforce noninstantiability. Here\'s the code sample from the book:

public fi         


        

Answer 1

UnsupportedOperationException sounds like the best fit, though a checked exception would be even better, since it might warn someone erroneously instantiating the class at compile time.