// File: Plant.java from the package edu.colorado.simulations
// Complete documentation is available from the Plant link in
// http://www.cs.colorado.edu/~main/docs/
package edu.colorado.simulations;
/******************************************************************************
* A Plant is an Organism with extra methods that
* allow it to be eaten.
*
* Java Source Code for this class:
*
* http://www.cs.colorado.edu/~main/edu/colorado/simulations/Plant.java
*
*
* @author Michael Main
* (main@colorado.edu)
*
* @version
* Jun 12, 1998
*
* @see Organism
******************************************************************************/
public class Plant extends Organism
{
/**
* Construct a Plant with a specified size and growth rate.
* @param initSize
* the initial size of this Plant, in ounces
* @param initRate
* the initial growth rate of this Plant, in ounces
* Precondition:
* initSize >= 0. Also, if initSize is zero, then
* initRate must also be zero.
* Postcondition:
* This Plant has been initialized. The value returned from
* getSize() is now initSize, and the value
* returned from getRate() is now initRate.
* @exception IllegalArgumentException
* Indicates that initSize or initRate violates
* the precondition.
**/
public Plant(double initSize, double initRate)
{
super(initSize, initRate);
}
/**
* Have this Plant lose some of its size by being eaten.
* @param amount
* The amount of this Plant that is eaten (in ounces).
* Precondition:
* 0 <= amount <= getSize().
* Postcondition:
* The size of this Plant has been decreased by
* amount. If this reduces the size to zero, then
* expire is activated.
**/
public void nibbledOn(double amount)
{
if (amount < 0)
throw new IllegalArgumentException("amount is negative");
if (amount > getSize( ))
throw new IllegalArgumentException("amount is more than size");
alterSize(-amount);
}
}