Add column to exiting TableModel

Question

I have a class;

public class A extends AbstractTableModel
{
 ...
}

Using ResultSetMetaData I build the TableModel to match my result set fr

Answer 1

I have adapted DefaultTableModel's addColumn method to a custom AbstractTableModel as follows. Assume that both the column identifiers (headers) and model data (localCache) are ArrayLists - the model data being an ArrayList of an ArrayList.

public void addColumn(String columnName, List columnData) {
    headers.add(columnName);
    colCount = headers.size();
    if (columnData != null) {
        for (int r = 0; r < localCache.size(); r++) {
            ((List)localCache.get(r)).add(columnData.get(r));
        }
    } else {
        System.out.println("Null columnData passed");
    }
    fireTableStructureChanged();
}