Lec 14 Writing an Instantiable Class III

Agenda Review of Instantiable Classes Scope of variables Using this to override scope issues Lab: Creating a Car class for a video game

Recall Structure of an Instantiable Class class Balloon size color Balloon inflate getSize getColor setColor pop Class Name Instance Varbls Methods Constructor method same name as class

Structure of an Instantiable Dog Class class Dog size Dog getSize setSize bark Class Name Instance Varbls Methods Constructor method same name as class

Now we'll begin ScopeThisDog Demo create Dog and MainApp classes show how scope errors can cause compile failure scope of – instance variables, parameters, and local variables Using keyword this to resolve scope issues in Class definition files

Scope errors in code below

Memory Map Dog fido = new Dog(30);

Lab14 You write a Car Class class Car double speed; int turnRate; Car getSpeed getTurnRate accelerate turnMoreLeft turnMoreRight Class Name Instance Varbls Methods Constructor method same name as class