Lab Description:

In this lab a Inheritance hierarchy is created for the class “Mobile Device” where “Mobile Device” is the superclass and the subclass “SmartPhone” Inherits from the SuperClass “Mobile Device”. The classes named “Andriod” , “iPhone”, and “WindowsPhone” are subclasses that inherit from there superclass “SmartPhone”. New commands and or syntax that are introduced and applied in this lab are: extends, this , and @Override. The keyword extends allows inheritance from one class to another, @Override tells the program that this method overrides the superclass’s method, and the “this” commands allows the object to reference itself.

Code Source:

package lab4_3640;

public class MobileDevice {
	private String deviceType = "Mobile Device";
	//set & getter methods

	public void setDeviceType() {

	}
	public String getDeviceType()

	{

		return this.deviceType;

	}
}

********************************************************

package lab4_3640;

//extends used for inheritance

public class SmartPhone extends MobileDevice { 
	private String deviceType;
	public SmartPhone(){

	deviceType = "SmartPhone";	
	//getter method which is override to return the string

	@Override

	public String getDeviceType() {

		// TODO Auto-generated method stub

		deviceType = super.getDevice() +" -> " + deviceType;

		return deviceType;

	}
}

***********************************************************

package lab4_3640;

//extends used for inheritance

public class Android extends SmartPhone {
	private String deviceType;
	public Android(){

	deviceType = "Android";	
	//getter method which is override to return the string

	@Override

	public String getDeviceType() {

		// TODO Auto-generated method stub

		deviceType = super.getDevice() +" -> " + deviceType;

		return deviceType;

	}
}

*****************************************************************

package lab4_3640;

//extends used for inheritance

public class iPhone extends SmartPhone {
	private String deviceType;
	public iPhone(){

	deviceType = "iPhone";	
	//getter method which is override to return the string

	@Override

	public String getDeviceType() {

		// TODO Auto-generated method stub

		deviceType = super.getDevice() +" -> " + deviceType;

		return deviceType;

	}
}

*********************************************************************

package lab4_3640;

//extends used for inheritance

public class WindowsPhone extends SmartPhone {
	private String deviceType;
	public WindowsPhone(){

	deviceType = "WindowsPhone";	
	//getter method which is override to return the string

	@Override

	public String getDeviceType() {

		// TODO Auto-generated method stub

		deviceType = super.getDevice() +" -> " + deviceType;

		return deviceType;

	}
}

***************************************************************************************

package lab4_3640;
public class MobileDeviceClient {
	public static void main(String[] args) {

		// TODO Auto-generated method stub

		MobileDevice myMobileDevice = new MobileDevice();

		SmartPhone mySmartPhone = new SmartPhone();

		iPhone myiPhone = new iPhone();

		Android myAndroid = new Android();

		WindowsPhone myWindowsPhone = new WindowsPhone();

		System.out.println(myMobileDevice.getDeviceType());

		System.out.println(mySmartPhone.getDeviceType());

		System.out.println(myiPhone.getDeviceType());

		System.out.println(myAndroid.getDeviceType());

		System.out.println(myWindowsPhone.getDeviceType());

	}

}
ScreenShots: