Page History

[Bloch 2008]

Item 8, "Obey the General Contract When Overriding equals"

[Darwin 2004]

Section 9.2, "Overriding the equals Method"

[Harold 1997]

Chapter 3, "Classes, Strings, and Arrays," section "The Object Class (Equality)"

Liskov, B. H.; Wing, J. M. (November 1994). A behavioral notion of subtyping. ACM Trans. Program. Lang. Syst.16 (6). pp. 1811–1841. doi:10.1145/197320.197383. An updated version appeared as CMU technical report: Liskov, Barbara; Wing, Jeannette (July 1999). "Behavioral Subtyping Using Invariants and Constraints" (PS).

[Sun 2006]

Determining If Two Keys Are Equal (JCA Reference Guide)

[Techtalk 2007]

"More Joy of Sets"