U3L03 - object dot

This lesson drills what Trevor teaches in U3L03

Pre-requirements:

• You have performed each of previous drills to reach a top speed, and then repeated top speed 10x
• Follow this for all drills explainer
• Or this if you haven't even installed the drills yet installation

Summary of what is drilled

A Disciplined Approach? holds that these items should never again allow any confusion in your mind about this list of what Trevor covered in this lesson:

COVERED IN THE LESSON

• properties of object can be of the class or of Object
• yada.foo where yada is class and foo is property references property
• yafa.foo = "whatever" assigns a property
• syntax: must backslash a double quote to use it inside a String
• System.out.println(objectReference) prints the objects memory location by default which calls the object's toString() method;
• to see how the java language itself is written, view TypeHierarchy and drill down inside the java code itself
• each instantiations of a class resolves to a different memory location on computer
• at this point the student can instantiate an object and set it's properties

Instructor Administered Test

• Create a new project
• Create a new package
• Create a new class with a new public static void main method
• create the class for Dinosoar with the String properties of weight, color, length
• from the main method, declare and instantiate a Dinosoar object named fred
• from the main method, set the properties of fred using dot properties
• print the fred object in the console