How to put JTable checkbox on the top of its cell

Question

my JTable only had 2 columns, one data type is boolean, display as checkbox, one data type is String,cell Renderer is JTextPane which data had large size ,and each row had different height depended on data size.
now the checkbox is displayed at the centre of each row, i hope it can be displayed on the top of this row, how i can set it. please help guide.
Many Thanks
Susan

Answer 1

Camickr,you are excellant, it's resolved as you said as following:
private JTable tblMain = new JTable(){
        public Component prepareRenderer(
            TableCellRenderer renderer, int row, int column) {
            Component c = super.prepareRenderer(renderer, row, column);
            if (c instanceof JCheckBox)
                ( (JCheckBox) c).setVerticalAlignment(JCheckBox.TOP);
            return c;
        public Component prepareEditor(
            TableCellEditor editor, int row, int column) {
            Component c = super.prepareEditor(editor, row, column);
            if (c instanceof JCheckBox){
                ( (JCheckBox) c).setVerticalAlignment(JCheckBox.TOP);
                c.setBackground(Color.white);
            return c;
    };