Java’s single inheritance limitation is usually not a problem in the normal course of development. In fact, the need to use multiple inheritance could be a sign of a bad design.

This two-part tutorial teaches you how to use inheritance in your Java programs. ... Java doesn’t support multiple inheritance through class extension, however.

It seems that MI has fallen severely out of favor. Neither of the two "big" programming languages to come out in the last few years, Java or C#, make use of multiple implementation inheritance ...