This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Agree that the equals method is the simplest way to do it, and most probably the best. By long objects, you obviously mean Long objects.
As an alternative you can get the value as a primitive with the longValue() method. Or use the compareTo() method and see whether the result is 0.