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I'm running 0.9.17. I have the following in my code: PiePlot plot = (PiePlot) piechart.getPlot(); plot.setLabelGenerator( new StandardPieItemLabelGenerator("{0} - {2}")); The above works fine when I render the chart in a ChartFrame, but if I do it in a servlet, I get an exception: javax.servlet.Serv...

Okay, after a day of working on it, I think I have something . . . When you do this: ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); You create a blank ChartRenderingInfo object. When you do this: ChartUtilities.writeChartAsPNG(out,chart,600,400,info); The "info" ob...

Subhani,

Make sure you only have one JFreeChart jar in you classpath. Look in your ear's, war's, and in your lib directory under your server config. This type of thing has caused me all kinds of headaches.

Does the ChartRenderingInfo somehow get magically populated with some information when the chart gets rendered when you call the method writeChartAsPNG()? I've tried looking at the code, but was no use. The secret is using the ToolTipTagFragmentGenerator and UrlTagFragmentGenerator options in getIm...

I have a servlet that creates the chart image directly to the output stream. I want this to be an image map, so I need to render the HTML. I have the ToolTipGenerator and UrlGenerator set in the chart, but the only example I can find of making the image map consists of this: ChartRenderingInfo info ...

I've been trying to write the HTML out, but have had no luck. When I try, I get an exception when trying to do a ChartUtilities.getImageMap. Here is info from my JSP: <img src="/wpConsole/ChartServlet" usemap="#chart" border='0' align='center'> <%=ChartServlet.getImageMap(sConsoleCookie)%> Methods f...

I decided to do this a route since my clustering question was answered. hkollmann's code worked great! My only problem is that I want an image map. Presently, I have my img tag as: <img src="/wpConsole/ChartServlet" usemap="/wpConsole/ChartServlet" border='0' align='center'> It brings up the image, ...

Has anyone had any luck with running a JFreeChart application under a clustered JBoss configuration? (i.e. running under "all" instead of "default" server) When I try it, I get a "Not-serializable" exception when the ServletUtilities tries to add ChartDeleter to the HTTPSession. It works fine when r...

In my lastest version of JDJ, I noted that JFreeChart was Second Runner up in the "Best Java Class" category. JFreeReport was also Third Runner up in the "Best Reporting Package" category. Both packages were the only open source packages that placed in their categories! Check it out here: http://www...

In the above, what is i and j??

I'm not a J2EE expert, but I'm having problems getting a chart from a servlet. I'm trying to follow the sample war but I keep getting a NullPointerException when it's trying to write the image file. From my JSP page: com.workpoint.client.ClientContext context = com.workpoint.client.ClientContext.cre...

Here is the code part of my JSP: <% com.workpoint.client.ClientContext context = com.workpoint.client.ClientContext.createContext(); context.open(sDSN,sResourceID,sPassword); JFreeChart chart = ResourceReport.getChart(context,"20040117","20040217"); ChartRenderingInfo info = new ChartRenderingInfo(n...

Yes it does -- through servlets. Grab and deplot the sample war:

http://homepage.ntlworld.com/richard_c_ ... freechart/

Customizing the renderer would be a wondeful idea . . . . but I decided not to look too deep renderer code.

Here is a method that works for me. I used an x-offset of 0.1. You may have to adjust this to your own need.

http://users.binary.net/thehaas/blogfil ... Notes.html

When I do a getY() on a XYDataItem, I get a NullPointException. When doing a trace via Eclipse, I see that the XYDataItem ("point" in the following code) has x equal to an double while y is null. And there are XYSeries in the dataset. Here is my code: XYSeries tempseries; double x,y; Double newval; ...