edu.rit.sim

Class Simulation

java.lang.Object

edu.rit.sim.Simulation

public class Simulation
extends java.lang.Object

Class Simulation provides a discrete event simulation. To write a discrete event simulation program:

1. Create a Simulation object.

2. Create one or more Events and add them to the simulation (by calling the doAt() or doAfter() methods).

3. Run the simulation (by calling the run() method). The simulation performs events, by calling each event's perform() method, in order according to the events' simulation times, as returned by each event's time() method. Performing an event may cause further events to be created and added to the simulation.

4. When there are no more events, the simulation is finished. At this point the simulation's run() method returns.

Constructor Summary

Constructors

Constructor and Description
Simulation() Construct a new simulation.

Method Summary

Modifier and Type	Method and Description
void	doAfter(double dt, Event event) Schedule the given event to be performed at a time dt in the future (at current simulation time + dt) in this simulation.
void	doAt(double t, Event event) Schedule the given event to be performed at the given time in this simulation.
void	run() Run the simulation.
double	time() Returns the current simulation time.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Simulation

public Simulation()

Construct a new simulation.

Method Detail

time

public double time()

Returns the current simulation time.

Returns:

Simulation time.

doAt

public void doAt(double t,
                 Event event)

Schedule the given event to be performed at the given time in this simulation.

Parameters:

t - Simulation time for event.

event - Event to be performed.

Throws:

java.lang.IllegalArgumentException - (unchecked exception) Thrown if t is less than the current simulation time.

java.lang.NullPointerException - (unchecked exception) Thrown if event is null.

doAfter

public void doAfter(double dt,
                    Event event)

Schedule the given event to be performed at a time dt in the future (at current simulation time + dt) in this simulation.

Parameters:

dt - Simulation time delta for event.

event - Event to be performed.

Throws:

java.lang.IllegalArgumentException - (unchecked exception) Thrown if dt is less than zero.

java.lang.NullPointerException - (unchecked exception) Thrown if event is null.

run

public void run()

Run the simulation. At the start of the simulation, the simulation time is 0. The run() method returns when there are no more events.