object$-$oriented approach problem part$1,$ the language is Java. We cannot use these and similar ones $($So we should simplify them and write them in detail.$)$:

str$.$split$(),$ str$.$replaceFirst$(),$ str$.$replaceAll$(),$ str$.$replace$(),$ append$(),$ str$.$hashCode$(),$ StringBuilder $($strictly forbidden$),$ any specific function or method

It is allowed to use:

lowerCase $,$ upperCase $,$ str$1+$ str$2,$ concat $,$ lastIndexOf$($ch$,$ fromIndex$),$ lastIndexOf$($s$),$ lastIndexOf$($s$,$ fromIndex$),$ str$.$substring$(),$ substring$($beginIndex$),$ substring$($beginIndex$,$ endIndex$),$ str$.$startsWith$(),$ str$.$endsWith$(),$ str$.$contains$(),$ str$1.$equals$($str$2)$ and so on$...$ Implement a Vehicle class with the following UML diagram.

A Vehicle object represents a vehicle with a license plate number and size.

The data field of size may take the values of $1,2,$ and $4.$

$($You may simply assume that $1$: motorcycle, $2$: car, $4$: truck$)$

You have to use this keyword in the implementation of the constructor.

Consider the following example which demonstrates the creation of a Vehicle object:

Vehicle vehicle $=$ new Vehicle $("34$CSE$1141",2)$;

getPlateNumber method should return the plate number of the vehicle.

getSize method should return the size of the vehicle.

getVehicleinfo method returns a string containing the vehicle's license plate

number and the size of the vehicle.

An example string as the following:

Vehicle Info

Plate Number : $34$CSE$1141$

Size : $2$

Implement a ParkPlace class with the following UML diagram.

A ParkPlace object represents a suitable place that the vehicle will be parked.

A ParkPlace object is created with a size of the vehicle and the vehicle itself.

You have to use this keyword in the implementation of the constructor.

Consider the following example which demonstrates the creation of a ParkPlace

object:

ParkPlace parkPlace $=$ new ParkPlace $($vehicle$)$;

getSize method returns the size of the ParkPlace object.

The size of the ParkPlace might be suitable for a motorcycle, a car, or a truck.

getVehicle method returns the Vehicle object of the ParkPlace object.

This represents which vehicle is parked in that place.