public StandardXYToolTipGenerator(String formatString, 
            NumberFormat xFormat, NumberFormat yFormat) {
        
        super(formatString, xFormat, yFormat);
    
    }

    /**
     * Creates a tool tip generator using the specified number formatters.
     *
     * @param formatString  the label format string (<code>null</code> not 
     *                      permitted).
     * @param xFormat  the format object for the x values (<code>null</code> 
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null</code> 
     *                 not permitted).
     */
    public StandardXYToolTipGenerator(String formatString, DateFormat xFormat, 
            NumberFormat yFormat) {
        
        super(formatString, xFormat, yFormat);