This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Kalabaw moo wrote:Because the superclass's method "doStuff()" is not overriden. If you wanted to override the superclass's method then you have to declare it abstract. Try to read more about inheritance.
Non-abstract methods can be overridden too. The reason doStuff is not overridden is that it is static. Static methods cannot be overridden.
Having said that though, that is not the reason for the output. Static method calls are resolved at compile time and even though you are calling the method on an instance of the class, the compiler ignores this and just uses the class type to decide what method to call. Because this is done at compile time and 'a' is an Animal array, your code is actually just the equivalent of