jfreechart

问题 I used a code in order to display a graph. I want to insert a button in this graph (Show details) that i will used in order to present some details about the graph .It is realisable? thanks. if(jCheckBox3.isSelected()) { try { con = getConnection("jdbc:mysql://localhost:3306/base_rapport","root",""); Statement statement = con.createStatement(rs.TYPE_FORWARD_ONLY,rs.CONCUR_READ_ONLY); String sql3 = "Select Vendor, sum(Rate) as Rate from (select case Vendor when 'NSN' then 'Nokia' else Vendor

问题 I have already searched enough on web but with no luck. I have created a stacked 3d bar chart wherein I am unable to change the default colors. I tried all the advices provided . Below a small snippet of my code. This is my input. My Data from Db is: A 0 2 B 15 53 C 0 2 D 0 2 E 0 1 F 1 0 G 0 1 Somehow I converted this to dataset requirement and also added items and models. CategoryDataset dataset = DatasetUtilities.createCategoryDataset(item,models, data); chart = ChartFactory

问题 I have seen several examples of using a Servlet to dynamically generate a chart using JFreeChart, and subsequently including that image in a JSP using an img tag. For example: <img src="/MyChartServlet" width="400" height="300" border="0" alt="" /> My servlet which generates the image using JFreeChart works great, and I can see the image if I call it directly in the browser as in: http:/myurl/MyChartServlet?id=274 The problem is that my JSP does not display the image. In fact, the JSP is not

问题 I have seen several examples of using a Servlet to dynamically generate a chart using JFreeChart, and subsequently including that image in a JSP using an img tag. For example: <img src="/MyChartServlet" width="400" height="300" border="0" alt="" /> My servlet which generates the image using JFreeChart works great, and I can see the image if I call it directly in the browser as in: http:/myurl/MyChartServlet?id=274 The problem is that my JSP does not display the image. In fact, the JSP is not

问题 I have a Gantt Chart with 5 tasks. Each task is divided into 3 sub-tasks. I need to define different color for each sub-task, e.g. Sub-task1: "light blue", Sub-task2: "blue", Sub-task3: "dark blue". I tried to google some examples, but I didn't find any full working example. Thanks. Update#1: I'm using IntervalCategoryDataset for the dataset. IntervalCategoryDataset dataset = createDataset(data); final Task t = new Task("Resource " + i, date(time11), date(time14)); t.addSubtask(new Task(

问题 I'm trying to show the histogram of an image and show only some colors. I've already done that with JFreeChart and createXYLineChart and getting all the data by iterating over all pixels. To speed it up I'm trying to do it with "createHistogram". I've followed this code. To update the chart with the new values I've used this two methods: XYPlot plot = (XYPlot) chart.getPlot(); plot.setDataset(setHistogram(red, green, blue)); Being setHistogram a method which returns a HistogramDataset

问题 how to customize the colors of JFreeChart graphic. lets see my java code : private StreamedContent chartImage ; public void init(){ JFreeChart jfreechart = ChartFactory.createPieChart("title", createDataset(), true, true, false); File chartFile = new File("dynamichart"); ChartUtilities.saveChartAsPNG(chartFile, jfreechart, 375, 300); chartImage = new DefaultStreamedContent(new FileInputStream( chartFile), "image/png"); } public PieDataset createDataset() { DefaultPieDataset dataset = new

问题 how to customize the colors of JFreeChart graphic. lets see my java code : private StreamedContent chartImage ; public void init(){ JFreeChart jfreechart = ChartFactory.createPieChart("title", createDataset(), true, true, false); File chartFile = new File("dynamichart"); ChartUtilities.saveChartAsPNG(chartFile, jfreechart, 375, 300); chartImage = new DefaultStreamedContent(new FileInputStream( chartFile), "image/png"); } public PieDataset createDataset() { DefaultPieDataset dataset = new

问题 I am currently migrating an application from a windows environment to a Redhat one. This application is using JfreeChart 1.0.6. It is a web app deployed in a tomcat 7 on a Redhat headless environment running on a Open-JDK6). I obtain the following PNG. It looks like handwrited chart and everything is shifted towards the top of the image. Did someone already encounter such issue and got a fix? See my chart below : image http://img194.imageshack.us/img194/4489/graph20120801105017.png See below

问题 I am generating a dynamic chart (XYLineChart) using jFreeChart and I have a field which is not included in the dataset. The field is generated dynamically. I want to include that in my tooltip. Is there any possibility I can do it ? Here is the flow of the program: Create Chart using an empty dataset. Set chartPanel. (I guess here is the place where we define the TooltipGenerator). Receive dynamic data from socket. Add data to the dataset. ( Here is the only place where I have the data which