[erik_seaberg]

Are you sure about Java? http://titanium.cs.berkeley.edu/doc/java-langspec-1.0/ talked about interfaces in 1996 and I don’t remember any version that didn’t have them.

[fault1]

java 1.0 most definitely had interfaces.

smalltalk on the other hand, did not have explicit interfaces: http://www.jot.fm/issues/issue_2002_05/article1/

[didibus]

Hum, guess you're right. For some reason I thought they introduced them in 1.3.