Chapter: Reusing Classes

Create a class called Amphibian. From this, inherit a class called Frog. Put appropriate methods in the base class. In main(), create a Frog and upcast it to Amphibian and demonstrate that all the methods will work.

In Java:

package chapter.reusingClasses;

class Amphibian {

    private void move() {
        System.out.println("Moving");
    }

    private void swim() {
        System.out.println("Swimming");
    }

    static void travel(Amphibian a) {
        a.move();
        a.swim();
    }
}

class Frog extends Amphibian {

}

public class Exercise16 {

    public static void main(String[] args) {

        Frog kermit = new Frog();

        Amphibian.travel(kermit);

    }

}

In Python:

class Amphibian:
    def move(self):
        print "Moving"

    def swim(self):
        print "Swimming"

    def travel(self):
        self.move()
        self.swim()

class Frog(Amphibian):
    pass

frog = Frog()
frog.travel()