Discussion 3: {O, b, j, e, c, t, s} Christine Zhou Agenda Announcements Review: OOP and Static vs Non-Static Worksheet #2 Review: Arrays Worksheet #3 and #4 Worksheet #1 Announcements Project 0: 2048 is due 9/18, next Monday! Lab this week will partially be about the project HW2 is out and due 9/22, next Friday Get started early! Midterm 1 Conflict Form on Piazza due 9/15, this Friday MT1 is Wednesday, Sept 27 8-10PM Discussion survey: tinyurl.com/czdisc3 Review: Object Oriented Programming Class: define characteristics and behaviors of our object, act as a blueprint/template for our objects Can create instances of the object by using the constructor and the new keyword Human h = new Human(“Bob”, 1) “this” refers to the object that you are creating, like “self” in Python! public class Human { String name; int age; static int population; public Human(String name, int age) { this.name = name; this.age = age; population += 1; } public void greet() { System.out.println(“Hi! I’m ” + this.name) } public static void getPopulation() { System.out.println(population); } } Review: Object Oriented Programming Non-static (instance) variables and methods: Belong to the object itself Each person has their own name, age, and way to greet people Static (class) variables and methods: What is one static method that you’ve seen already? Belong to the class, no notion of “this” Preceded with “static” The “population” variable belongs to all Humans, not just one Human! public class Human { String name; int age; static int population; public Human(String name, int age) { this.name = name; this.age = age; population += 1; } public void greet() { System.out.println(“Hi! I’m ” + this.name) } public static void getPopulation() { System.out.println(population); } } Review: Object Oriented Programming Examples // In the Human class public class Human { public void testNonStatic(Human you) { greet(); this.greet(); you.greet(); Human.greet(); ge