zootal

How would you go about creating a list of objects, where each object can
contain a list of objects, and each sub-object would have various
properties(string, int)?

This is an example. The parent object would be forms of transportation -
car, bike, etc. Each parent object has child objects (chevy, ford, etc.) and
each of these child objects has the same properties (number of doors,
color). How would I represent this data? I need some pointers to start me in
the right direction.

Car - Chevy - 4 doors, green paint
- Ford - 2 doors, purple paint
- Nissan - 3 doors, red paint
Bike - 26 inch, green
- 27 inch, purple

tia

It depends a lot on how you intend to use the objects. Do you want a
unique set? Do you want them ordered? Do you plan to add or remove items
from the list a lot? Do you want to allow nulls? My top two picks for
holding objects are java.util.Map and java.util.Set of the Collections
framework. Both are capable of holding your objects.

Find out about Collections Framework here:

http://java.sun.com/j2se/1.4.2/docs/guide/collections/index.html

This is a good book which explains the Collections Frameworks very easily:

Java Collections
by John Zukowski
ISBN: 1893115925

marc

Also Sams Java in 21 days is highly unrecommended if you're new to Java
in general. Covers lots of collection types; vector, arraylist and
hashtable spring to mind.

--
Marc
For contact information, please see my web site: http://www.iMarc.co.uk/

zootal

I'll check that out. One thing I'm having trouble finding is code examples
for the beginner. Sun has a nice tutorial on collections, but where are the
code samples?

paul hamaker

For Collection examples, see :
http://javalessons.com/cgi-bin/fun/java-tutorials-main.cgi?sub=adv&ses=ao789
: a8 thru a12-5 and
http://www.exampledepot.com/egs/java.util/pkg.html
--
http://javalessons.com Paul Hamaker, SEMM
Teaching ICT since 1987

ook

Nice, thank you