Consider the following classes.

public class order $\{$

private ShippingContainer packaging;

private Item$[]$ ordercontents;

public Order$()\{//$ initialize all attributes to non$-$null values $\}$

$\}$

abstract class Shippingcontainer $\{$

abstract double getcost$()$;

$\}$

abstract double getVolumeInLiters$()$;

abstract class Box extends ShippingContainer $\{$

abstract double getHeight$()$;

abstract double getwidth$()$;

$\}$

abstract double getDepth$()$;

abstract class Envelope extends ShippingContainer $\{$

abstract double getHeight$()$;

$\}$

abstract double getwidth$()$;

abstract class Item $\{$

$\}$

abstract double getPrice$()$;

True or False: To create a running program and generate an with the code provided, you must create a concrete class that extends Shippingcontainer.

True

False