tablePreview.setColumnColor( i, ColorPalette.getInstance( ) .getColor( tablePreview.getColumnHeading( i ) ) );
tablePreview.setColumnColor( i, ColorPalette.getInstance( ) .getColor( ChartUIUtil.getExpressionString( tablePreview.getColumnHeading( i ) ) ) );
	private void refreshTableColor( )	{		// Reset column color		for ( int i = 0; i < tablePreview.getColumnNumber( ); i++ )		{			tablePreview.setColumnColor( i, ColorPalette.getInstance( )					.getColor( tablePreview.getColumnHeading( i ) ) );		}	}