Problema ao passar a query para o JTABLE

class CL_ResultSetTableModel extends AbstractTableModel {
    // Currently displayed result set

    private ResultSet rs;
    // Associated metadata
    private ResultSetMetaData rsMeta;
    // Column count

    private int columnCount;
    // Column nmaes
    private final Vector<String> columnNames = new Vector<String>();

    // Vector of rows
    private final Vector<Object[]> cache = new Vector<Object[]>();

    /** Set new result set */
    public void setResultSet(ResultSet rs) throws SQLException {

        if (this.rs != null)
            this.rs.close();
        cache.clear();
        // 'Cache' some metadata data

        rsMeta = rs.getMetaData();
        columnCount = rsMeta.getColumnCount();
        columnNames.clear();
        for(int col = columnCount; col > 0; col--) {

            columnNames.add(rsMeta.getColumnName(col));
        }
        // 'Cache' new resultest data
        while(rs.next()) {

            Object rowData[] = new Object[columnCount];
            for(int col = columnCount; col > 0; col--)

                rowData[col - 1] = rs.getObject(col);
            cache.add(rowData);
        }
        // Reload table structure
        fireTableStructureChanged();

    }
    /** Close result set */
    public void close() throws SQLException {
        rs.close();
    }
    /** ## TableModel interface ## */
    public String getColumnName(int column) {
        return columnNames.get(column);
    }
    /** ## TableModel interface ## */
    public Object getValueAt(int rowIndex, int columnIndex) {

        Object[] row = cache.get(rowIndex);
        return row[columnIndex];
    }
    /** ## TableModel interface ## */
    public int getRowCount() {
        return cache.size();
    }

    /** ## TableModel interface ## */
    public int getColumnCount() {
        return columnCount;
    }
}