Class Throttle

A Throttle object simulates a throttle that is controlling fuel flow

Constructor

public Throttle(int size)
Parameters

size, the number of on positions

Precondition

Size > 0

Postcondition

Throttle initialized with specified # of on positions; initially off

Throws

IllegalArgumentException

Constructor

public Throttle( )
Postcondition

Throttle initialized with 5 on positions; initially off

Throws

IllegalArgumentException

getFlow

public double getFlow( )

Get the current flow of this Throttle

Returns

The current flow rate

isOn

public boolean isOn( )

Check whether Throttle is on

Returns

If Throttle flow is above zero, returns true; otherwise returns false

shutOff

public void shutOff( )

Turn off this Throttle

Postcondition

The Throttle's flow is shut off

shift

public void shift(int amount)

Move Throttle position up or down

Postcondition

Throttle's position has been moved by amount. If result is more than top position, then position set to top. If result is less than zero position, then position set to zero.