void initD(){
        tableMessage.setDefaultRenderer(Object.class, new DefaultTableCellRenderer()
        {
            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
            {
                final Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
                if (row > 3) c.setBackground(row % 2 == 0 ?  new Color(230,240,230) : Color.WHITE);
                else{
                    c.setFont( new Font(c.getFont().getName(), Font.BOLD, c.getFont().getSize()) );
                    c.setBackground(  Color.LIGHT_GRAY );
                }
                return c;
            }
        });

        table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer()
        {
            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
            {
                final Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
                c.setBackground(row % 2 == 0 ? new Color(230,240,230)  : Color.WHITE);
                return c;
            }
        });

    }