Object$-$Oriented Approach Problem PART$1!!$Our aim in this question is to learn the use of the methods. The language is Java. Please do not use complex functions $.$ Please show the implementation. 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$...$ n this h omewoOOOOOOOrk, you will implement a program with an object$-$oriented approach.

$1.$ Implement a Vehicle class with the following UML diagram. Vehicle $-$plateNumber : String $-$size: int $+$Vehicle $($plateNumber: String, size: int$)$

$+$getPlateNumber$()$: String

$+$getSize$()$: int

$+$getVehicleInfo$()$: String

$$ 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 : $2$

$2.$ 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.

ParkPlace

$-$size: int

$-$vehicle: Vehicle

$+$ParkPlace $($vehicle: Vehicle$)$

$+$getSize$()$: int

$+$getVehicle$()$: Vehicle

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.

o 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.

o This represents which vehicle is parked in that place