r. ching mis department california state university, sacramento week 12 object-oriented...

R. Ching MIS Department California State University, Sacramento

Week 12Week 12Object-Oriented Object-Oriented ProgrammingProgramming

Base and Derived ClassesBase and Derived Classes

Lab ExerciseLab Exercise

R. Ching MIS Department California State University, Sacramento

StepsSteps

• Create the classCreate the class

• Define the propertiesDefine the properties

• Create the accessor methodsCreate the accessor methods

• Create the constructorsCreate the constructors

• Create the formCreate the form

• Create the derived classesCreate the derived classes

R. Ching MIS Department California State University, Sacramento

Add the class from the Project menuAdd the class from the Project menu

R. Ching MIS Department California State University, Sacramento

Assign a name to the classAssign a name to the class

R. Ching MIS Department California State University, Sacramento

Define the class’ Define the class’ propertiesproperties

R. Ching MIS Department California State University, Sacramento

Accessor MethdodsAccessor Methdods

Add the accessor Add the accessor methodsmethods

Tests the length Tests the length of the character of the character stringstring

R. Ching MIS Department California State University, Sacramento

R. Ching MIS Department California State University, Sacramento

R. Ching MIS Department California State University, Sacramento

ConstructorsConstructors

Add the Add the constructorsconstructors

R. Ching MIS Department California State University, Sacramento

Create the FormCreate the Form

Text boxesText boxes

Combo boxCombo box

Text boxText box

Group boxGroup box

Radio buttonsRadio buttons

ButtonsButtons

List boxList boxLabelsLabels

R. Ching MIS Department California State University, Sacramento

Add the SubclassesAdd the Subclasses

R. Ching MIS Department California State University, Sacramento

R. Ching MIS Department California State University, Sacramento

Constructor Constructor (the same (the same for each for each class)class)

R. Ching MIS Department California State University, Sacramento

Super and Super and SubclassesSubclasses

R. Ching MIS Department California State University, Sacramento

Define the ObjectsDefine the Objects

Objects to classesObjects to classes

ObjectObject

ClassClass

R. Ching MIS Department California State University, Sacramento

Button ClickedButton Clicked

Find the Find the checked radio checked radio buttonbutton

Instantiate Instantiate the objectthe object

R. Ching MIS Department California State University, Sacramento

R. Ching MIS Department California State University, Sacramento

R. Ching MIS Department California State University, Sacramento

Adding Shared VariablesAdding Shared Variables

R. Ching MIS Department California State University, Sacramento

Read-only Read-only property property proceduresprocedures

R. Ching MIS Department California State University, Sacramento

Temporary FixTemporary Fix

R. Ching MIS Department California State University, Sacramento

When the user selects an item in the list box, When the user selects an item in the list box, the corresponding counts appear in the labelsthe corresponding counts appear in the labels

R. Ching MIS Department California State University, Sacramento

Test for the Selected ItemTest for the Selected Item

R. Ching MIS Department California State University, Sacramento