Class VehicleGenerator

java.lang.Object

VehicleGenerator

public class VehicleGenerator
extends java.lang.Object

Generates vehicles with varying probability. Versions: 2018-03-23 New constructur with predefined arrivals 2018-12-16 Construtors renamed. Predefined arrivals default.

Constructor Summary

Constructors

Constructor and Description
VehicleGenerator() Will use the predefined array arrivals to generate vehicles.
VehicleGenerator(int i) Hard coded probabilities.
VehicleGenerator(java.lang.String filename) This constructor reads the arrival and turning probabilities for different time periods from a file.

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] args) Demonstration program for the VehicleGenerator
void	print() Prints the current setup of the generator
Vehicle	step() Generate a vehicle according to the probabilities for this time step
java.lang.String	toString() Returns the current state

Methods inherited from class java.lang.Object

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

Constructor Detail

VehicleGenerator

public VehicleGenerator()

Will use the predefined array arrivals to generate vehicles. See the step method!

VehicleGenerator

public VehicleGenerator(int i)

Hard coded probabilities. The used probabilities will most certainly produce traffic jam.

Parameters:

i - Not used

VehicleGenerator

public VehicleGenerator(java.lang.String filename)

This constructor reads the arrival and turning probabilities for different time periods from a file.

Each line of input defines the probabilities for a specific period with the following contents

1. Number of time steps (int).
2. Arrival probability (double) [0, 1].
3. Turning probability (double) [0, 1].
4. Optional comment. Ignored.

Example: The following five lines defines five periods of length 100, 20, 60, 30 and 50, respectively with different arrival and turning probabilities.

      100   0.2   0.3   Night
       20   0.8   0.8   Morning rush rush
       60   0.5   0.5   Day
       30   0.7   0.6   Afternoon rush
       50   0.8   0.4   Evening
 

Parameters:

filename - name of file with probabilities (US conventions)

Method Detail

step

public Vehicle step()

Generate a vehicle according to the probabilities for this time step

Returns:

A vehicle or null

toString

public java.lang.String toString()

Returns the current state

Overrides:

toString in class java.lang.Object

print

public void print()

Prints the current setup of the generator

main

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

Demonstration program for the VehicleGenerator

Parameters:

args - Not used