Reducing Rendering time with JTable

Question

Hi,
Currently I have an application which builds a JTable from a fetched database resultset. The resultset contains a date field, which is shown in the JTable as well. I roughly have 100,000 records which are placed in the JTable.
Now for the problem. I have a custom renderer which renders each row in a specific font and a black foreground colour. However, when the date field is in the future the row should have a grey foreground colour. My application does this perfectly, however the loading time is extremely long in comparison with not doing this check.
The reason for this lies at the renderer. After the database has fetched he records, my application checks which records are in the future and builds a list. This list contains the rows that should be coloured grey. Building this list takes a long time though since every row has to be checked. Is there a way to make this more efficient? To sum it up, this is what happends:
*Database fetches all records
*Application checks which rows are in the future
*Application builds a "future"-list, containing the rownumber which row should be coloured grey.
*The list gets passed to the renderer
*The renderer checks if the "future"-list contains the rownumber.  (intensive operation, this is where most processing time goes)
*If the list contains the number the row is coloured grey. Otherwise the row is coloured black.
Thanks

Answer 1

First read camicker's column, he's got good and solid knowledge, and I don't want to get into it with him again. Once you get your renderer fixed, what are you going to do about your TableModel. Are you using AbstractTableModel or DefaultTableModel and why. Your project requires some thought about this data storage too.
Note: You may incorporate into your app SQL and a ResutSet to only select certain rows of data to begin with, instead of retrieving all records all the time. I mean... since you are using a database?
Edited by: pierrot_2 on Feb 21, 2009 11:35 AM