Type casting, instanceof. Big challenge for interfaces.
instanceof
Reference type casting: expansion and contraction. type cast
Singleton pattern
What else can you look at at your leisure: “Information about types” in Thinking in java RTTI - run-time type identification Conversion of reference types or a sleeping wolf on the keyboard http://habrahabr.ru/post/27108/ https://docs.oracle .com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.6 https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html# jls-5.5
Found a cool link to the material on this topic? Add it here as a comment. Perhaps your link will help another person become a programmer and improve their life!
What else can you look at at your leisure: “Information about types” in Thinking in java RTTI - run-time type identification Conversion of reference types or a sleeping wolf on the keyboard http://habrahabr.ru/post/27108/ https://docs.oracle .com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.6 https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html# jls-5.5
GO TO FULL VERSION