Discussion 4: Inheritance Christine Zhou Agenda Announcements Review: Inheritance Problem 1 Review: More Inheritance Problem 2 Review: Static/Dynamic Types Problem 3 Announcements Office hours was crowded… Make sure to get started early and go to office hours earlier for help! Piazza questions: give us more information! What is the error that is being outputted? What have you tried to fix the error? Git-bug Proj0 due Monday 11:59PM See late policy on the course website HW2 due this Friday 11:59PM, go to OH early!! Guerrilla section planned for this weekend Saturday, 1-3PM in the labs Midterm next week on Wednesday 9/27 8-10PM Discussion survey: tinyurl.com/czdisc4 Review: Inheritance public class Fish { String name; public Fish(String name) {...} public class Goldfish { String name; public Goldfish(String name) {...} Public void eat() {...} public void blink() {...} public void eat() { print(“bloop”); ... } } public void blink() {...} } Review: Inheritance extends (can extend only one class) Inherits all instance variables and methods Constructor is not inherited, but there will be an implicit call to super( ) in the beginning of the subclass’s constructor (need to make the Fish before making the Goldfish) constructor() { this.hello = 10; constructor() { super(); SAME! } this.hello = 10; } constructor() { this.hello = 10; DIFFERENT! } this.hello = 10; constructor() { super(10); Review: Inheritance public class Fish { String name; public Fish(String name) {...} Public void eat() {...} public void blink() {...} public class Goldfish extends Fish { public Goldfish(String name) { super(name); // need to have this! ... } public void eat() { print(“bloop”); super.eat(); } } } 1 Creating Cats Given the Animal class, fill in the definition of the Cat class so that it makes a "Meow!" noise when greet() is called. Assume this noise is all caps for kittens (less than 2 years old). How similar are Cats with Animals? How do we t