Class Waste

java.lang.Object
  |
  +--Waste

Direct Known Subclasses:

LiquidWaste, SolidWaste, TrashWaste

public class Waste

extends java.lang.Object

Stuff that you might try to flush down a toilet.

We'll distinguish among a few different varieties of waste by having different subclasses. But none of the Waste classes currently have any interesting fields or methods, since the toilet doesn't need to do anything interesting with the waste, just erase it.

If we decided our program should follow the waste through the sewage system and process it, then we could add details to the class:

• We might want waste objects to have interesting data fields like w.volume, w.odor, and w.nitrogenContent.
• We might want waste objects to implement interesting methods like w.decompose(), and w.treat(Chemical).
• Specific subclasses of Waste might have additional fields, such as SolidWaste.count and TrashWaste.isBiodegradable.
• The Waste class might include static methods not associated with a particular object. For example, Waste.add(Waste, Waste) could combine two different waste objects. Waste.sum(Waste[]) could mix a whole array of different kinds of waste and return sewage sludge.

Field Summary

protected java.lang.String

description

Constructor Summary

Waste(java.lang.String s)
The constructor; we could add others.

Method Summary

void	deposit(Toilet t) This is a convenience function.
java.lang.String	toString() To get a printable version of the waste, we just use its description string.

Methods inherited from class java.lang.Object

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

Field Detail

description

protected java.lang.String description

Constructor Detail

Waste

public Waste(java.lang.String s)

The constructor; we could add others.

Parameters:

s - A description of the waste.

Method Detail

toString

public java.lang.String toString()

To get a printable version of the waste, we just use its description string. This overrides the default toString() method inherited from Object.

Overrides:

toString in class java.lang.Object

deposit

public void deposit(Toilet t)

This is a convenience function. If w is some waste and t is a toilet, then w.deposit(t) is the same as t.deposit(w).

Parameters:

t - The destination.