Create the following classes.
Animal
is an abstract class
Animal(String kind)
constructor to create an animal of a
certain kind.public String noise()
: an abstract methodpublic void speak()
: print out “a [kind] says [noise()].”
Cat
is a subclass of Animal
. It makes the “miaou” noise.
Dog
is a subclass of Animal
. It makes the “ruff” noise. Dogs can
also do public void trick()
, which prints out “shake”.
Borzoi
is a subclass of Dog
. The Borzoi does not bark, the only
noise it makes is a “whine”.
Boxer
is a subclass of Dog
. The Boxer knows the “tug of war” trick.
Discuss how they can and cannot be used in a Java program. See the testAnimals function (also as plain text).
This example is more abstract but reviews the same ideas.
public class A {
public void p() { print("hi"); q(); }
public void q() { print("Sally"); }
}
public class B extends A {
public void p() { super.p(); print("bye"); }
}
public class C extends A {
public void q() { print("Ava"); }
public void r() { print("$1000"); }
}
Questions about the code or as text.