Making a Structure out of a class

[Nick Ueda]

I am trying to make a structure out of a class.
Here is what I am doing

import java.util.ArrayList;
class Entry
{
public StringBuffer filename;
public StringBuffer htmlfile;
public StringBuffer urlname;
Entry(StringBuffer url,StringBuffer fname, StringBuffer html)
{
urlname = url;
filename = fname;
htmlfile = html;
}
}
class Html_DB
{
public static ArrayList arrayList;
Html_DB()
{
arrayList = new ArrayList();
}
public void store_html(Entry entry)
{
arrayList.add(entry);
}
public int size()
{
return arrayList.size();
}

public StringBuffer retrieve_url(int index)
{
Entry anEntry = (Entry) arrayList.get(index);
return anEntry.urlname;
}
public StringBuffer retrieve_filename(int index)
{
Entry anEntry = (Entry) arrayList.get(index);
return anEntry.filename;
}
public StringBuffer retrieve_html(int index)
{
Entry anEntry = (Entry) arrayList.get(index);
return anEntry.htmlfile;
}
public void dumpContents()
{
    for(int i = 0; i < arrayList.size(); i++)
    {
Entry entry = (Entry) arrayList.get(i);
System.out.println("filename: " + entry.filename.toString());
System.out.println("urlname: " + entry.urlname.toString());
//System.out.println(entry.htmlfile);
    }
}
}

Then I am storing it in an user created object of html_db using the collection arrayList.

/*** Files are added to the Html_DB here ***/
StringBuffer nameOfURL = new StringBuffer(page.toString());
StringBuffer nameOfFile;
while(index_search.isMoreFiles()){
nameOfFile = new StringBuffer(index_search.getNextFile());
nameOfURL.append(nameOfFile);
entry = new Entry(nameOfURL,nameOfFile,pageOpener.openPage(nameOfURL));

html_db.store_html(entry);
nameOfURL.delete(0,nameOfURL.length());
nameOfURL = new StringBuffer(page.toString());
nameOfFile.delete(0,nameOfFile.length());
}

Basically whenever I try to retrieve any data like this:

    for(int i = 0; i < html_db.size(); i++)
    {
System.out.println("filename: " + html_db.retrieve_filename(i));
System.out.println("urlname: " + html_db.retrieve_url(i));
    }

All I get is blank entries.
filename:
urlname:
filename:
urlname:
filename:
urlname:
filename:
urlname:
filename:
urlname:
I don't know if maybe everytime a new Entry is created it is overwriting
the previous one even if it is already in the html_db.
Any help would be very much appreciated.
Thanks,
Nick Ueda
[ August 05, 2003: Message edited by: Nick Ueda ]

[Marcus Howarth]

Hi Nick,
I firstly wondered about the use of String Buffers everywhere, I'll have to try that later when I get time.. not sure if there maybe a problem with passing mutable objects around like that.. (I'm only thinking this as someone was talking about how you shouldn't use StringBuffer's in HashMaps the other day)
quick look at the code

 
for(int i = 0; i < html_db.size(); i++)    
{
         System.out.println("filename: " + html_db.retrieve_filename());
         System.out.println("urlname: " + html_db.retrieve_url());    
}

don't you have to provide an index to these methods? pass in your iterator?

[Nick Ueda]

I apologize, in my actual code there is an index i being supplied to the method, I was tired and accidentally left it out while typing.
Does anybody else have any other suggestions?
Thanks,
Nick Ueda