If I want to use a JTable in Java it seems to me for adding rows and doing alters from behind a button or so I always have to use a TableModel (this could be the default one or one created by your own) But my question is: Why do we have to use this. I can't find this in any of the posts I saw. Can someone explain how this works and why it is necessary? And why we can't just add rows to the JTable without a model.
It seems to me that if you want to just show a few records but at creation you don't know all the rows yet it would be easier to just do something like a table.add() to add the row.
You can create the table with data inside without a model attached to it. So why not add data?
Or am I just wrong and can you add also data without a model?
The TableModel interface defines the minimum methods needed by a JTable (view) to render its content (model). AbstractTableModel is an abstract implementation that provides the event plumbing and leaves just three methods that must be overridden. DefaultTableModel goes on to include an internal data model based on Vector and convenient methods to alter that internal model. See Creating a Table Model for a comparison and these contrasting examples.