I have written posts about using Objects class: JDK 7: The New Objects Class and Java 7 Objects-Powered Compact Equals.

Now, that gets very, very interesting because it, uh, requires a bit of knowledge of the hashCode method, and it also requires a little bit of knowledge of the equals method.

Equals and hashcode implementation in wrapper classes Wrapper classes override the equals() method to perform value-based comparisons rather than the reference comparison used by Object.equals().