cscie160.hw2
Class Elevator

java.lang.Object
  |
  +--cscie160.hw2.Elevator

public class Elevator

extends java.lang.Object

CSCIE160

Assignment 2: Elevator part 2

This is a partial simulation of an Elevator by using the sweep algorithm.

By David Cheung

Field Summary

Floor[]	arrayOfFloors Stores the array of floors that the Elevator travels upon.
int	Capacity The maximum number of people in an Elevator.
int	currentDirection The current direction of the elevator: 1=up, -1=down and 0=not moving.
int	currentFloor The current floor that the Elevator is on.
boolean[]	destRequests Stores the destination requests for each floor and the value would be boolean.
int	numOfFloors The number of floors in the building.
int[]	numOfPassDestForEachFloor Stores the number of passengers destined for each floor.
int	numOfPassengers The number of passengers currently in the elevator

Constructor Summary

Elevator()
Initializes class by creating an array with size of numOfFloors + 1.

Method Summary

void	boardPassenger(int destFloor) This increments number of passenger destined there by one, and increase the number of passengers in elevator by one.
static void	main(java.lang.String[] argv) Starts the main part of the class, start with adding passengers in the Elevator and then add a bunch of passengers on some floors.
void	move() Moves Elevator from its current floor to the next floor.
void	registerRequest(int numFloor) Sets the destRequests array.
void	stop() Does not actually stop the elevator in real time but just to allow the simulation to process the numbers when stop is called.
java.lang.String	toString() Prints the current status of the elevator.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

Capacity

public final int Capacity

The maximum number of people in an Elevator. This is hardcoded to 10.

numOfFloors

public final int numOfFloors

The number of floors in the building. This is hardcoded to 7.

currentFloor

public int currentFloor

The current floor that the Elevator is on.

currentDirection

public int currentDirection

The current direction of the elevator: 1=up, -1=down and 0=not moving.

numOfPassengers

public int numOfPassengers

The number of passengers currently in the elevator

destRequests

public boolean[] destRequests

Stores the destination requests for each floor and the value would be boolean. Therefore the size of this array should be numOfFloors.

numOfPassDestForEachFloor

public int[] numOfPassDestForEachFloor

Stores the number of passengers destined for each floor. The size of array should be # of floor, and each value is number of passengers.

arrayOfFloors

public Floor[] arrayOfFloors

Stores the array of floors that the Elevator travels upon.

Constructor Detail

Elevator

public Elevator()

Initializes class by creating an array with size of numOfFloors + 1. Sets initial direction to UP.

Method Detail

move

public void move()

Moves Elevator from its current floor to the next floor. This depends on which direction the floor moves.

If the floor is at the top, this will switch the direction of the floor to down (-1) and up (1) if the elevator is at the lowest floor.

Calls the stop function if there is a floor that needs to be stopped.

Calls toString function at the end of this.

See Also:

stop(), toString()

toString

public java.lang.String toString()

Prints the current status of the elevator. Called by move each time move is executed.

Added for HW 2, this prints the number of people on each of the floors of the elevator.

Overrides:

toString in class java.lang.Object

See Also:

move()

stop

public void stop()

Does not actually stop the elevator in real time but just to allow the simulation to process the numbers when stop is called.

Now it is changed so that unloadPassengers does the passenger pulling and loading the passengers to the elevator.

Before calling unloadPassenger stop would set the destRequests off for that floor.

See Also:

Floor.unloadPassengers(Elevator)

boardPassenger

public void boardPassenger(int destFloor)
                    throws ElevatorFullException

This increments number of passenger destined there by one, and increase the number of passengers in elevator by one.

Called by Floor.unloadPassengers

Parameters:

Floor - Destination floor for a passenger.

See Also:

Floor.unloadPassengers(cscie160.hw2.Elevator)

registerRequest

public void registerRequest(int numFloor)

Sets the destRequests array. Called by Floor.unloadPassengers.

Parameters:

numFloor - The floor number of the floor that is making the request.

See Also:

Floor.unloadPassengers(cscie160.hw2.Elevator)

main

public static void main(java.lang.String[] argv)

Starts the main part of the class, start with adding passengers in the Elevator and then add a bunch of passengers on some floors.

Used a FOR loop to do a 2 round trip sweep. Note: I used a FOR loop instead of WHILE loop because FOR loop allows me to look at the data after the program ends. Whereas WHILE loop will generate a lot of unnecessary data.