Ass4 Question 8

Time is running out and I am now getting desperate! Can anyone supply me with the car class from Ex 8.2, so that I can just concentrate on Ex 8.3 opposed to having to do 8.2 first (which is not part of the assignment).

Can soemone send me their Customer and Address classes from 6.1, so that I can just concentrate on ex 8.4 opposed to having to go back to chapter 2! I could not do assignment 3 because of work commitments.

Time is not on my side and I am in desperate need to get at least 30 credits for this assignment.

Your help will be greatly appreciated.

Many thanks
Duncan

Hey Duncan,

The basic car class should be something like this:

import java.util.*;

public class Car implements Comparator{
public Car() {}

public Car (final String dstrModel, final int dYear,
final String dManufacturer,
final String dstrColor, final int dHorsepower,
final int dNoOfCylinders
) {
strModel = dstrModel;
Year = dYear;
Manufacturer = dManufacturer;
strColor = dstrColor;
Horsepower = dHorsepower;
NoOfCylinders = dNoOfCylinders;
}

//Accessors ......etc

public String toString() {
return "Model: " + strModel + " Year: " + Year + ", Manufacturer: " + Manufacturer +
", Color: "
+ strColor + ", Horsepower: " + Horsepower + ", NoOfCylinders: " + NoOfCylinders;
}

public int compare(Object o1, Object o2) throws ClassCastException {

//needs to be implemented
}

//mutators .....

protected String strModel, Manufacturer;
protected int Year, Horsepower, NoOfCylinders;
protected String strColor;
}


The next part I am finding tough, need to implement the Comparator method and get it to sort the data.



Anyway, hope that helps,




Chris

Hi Chris,

Very many thanks for your response, I was beggining to think I was being avoided. I thrashed about and came up with something similar to what you have, but then just got lost in the wilderness. I am now trying the next excersise with just as little success.

My problem is that I have only one more evening after today, as I will be going into the field for a few weeks.

many thanks for your help. If you get any more inspiration, I would be grateful for your comments

Cheers
Duncan

Note in 8.2 the Car class should implement the Comparable interface not the Comparator interface. 8.3's Car2 class should extend Car. This one should give the comparators.

You can't have more than one comparator in a class.

This is a dumb question, I quit!

Haha, I interpreted the question in the wrong way. Is actually quite easy.

Easy how so? what did you do? As I've been stressing about this all day and haven't gotten any brainwaves.

Well, if you have a question I will answer. But "how did you do it?" aint gonna work...

Well what I don't know is how to write comparators for each item and how to compare them. SO my question is how do you compare them if you can help with that I can do the rest

Well what I don't know is how to write comparators for each item and how to compare them. SO my question is how do you compare them if you can help with that I can do the rest

Well, you wrote the Comparable... I.e. the compareTo, and you compare them in the same way, with the compare, you only use one parameter (that is a set parameter, because you have one "compare" for each attribute of the car) and not three like in compareTo

Thanks sleek, I'm such an idiot for not seeing it the first time

Yay for hackers!