jfreechart

问题 I had a java program which uses jfreechart API to create histogram, which is running fine in windows system but the same is not running in unix system. It is saying NoClassDef exception. I have added the jfreechart jar to the lib in Unix... Do I need to do anything else to make it run? 回答1: NoClassDef exceptions are really only thrown for the fact the class simply doesn't exist. Are you running the application through an IDE? If so, make sure the jar is in the classpath. If not, make sure you

问题 What facilities or performance capabilities jFreeCharts latest version (1.0.14) provides over 2004 edition (0.9.20). We have web application having jFreeCharts integrated with 2004 edition . What advantages we would be having if we upgrade it to the latest version? Classes must be added or modified in the latest version. 回答1: Such information is recorded in the project: https://sourceforge.net/projects/jfreechart/ You can browse the subversion repository: https://jfreechart.svn.sourceforge

问题 I want to dynamically update two separate series in a jfree chart histogram. When i look at HistogramDataset it doesn't seem like there is a method for that. Is this possible? I know it can be done in SimpleHistogramDataset but I need to have two series on this chart. 回答1: Some alternatives: Replace the HistogramDataset with each update: chart.getXYPlot().setDataset(newDataset); Add a second SimpleHistogramDataset and XYItemRenderer to the plot: SimpleHistogramDataset newDataset =

问题 I purchased the Docs/support from ObjectRefinery for JFreeCharts. When running ant the following occurs: $ cd ant && ant BUILD FAILED /shared/jfreechart-1.0.19-demo/ant/build.xml:66: Warning: Could not find file /shared/jfreechart-1.0.19-demo/source/demo/orsoncharts/iStock_000003105870Small.jpg to copy. Actually that file does not exist anywhere in the project -or any jpg for that matter: freechart-1.0.19-demo $find . -name \*.jpg <no results> So how to build this demo code? 回答1: There are

问题 I would like to hide/show plots in combinedDomainXYPlot but the class only allows to add/remove plots. For instance, if I have 3 plots, I remove the second, and then add it, visually it is going to add it as the third chart at the bottom. Is there any way to maintain the charts order visually? 回答1: I'd use a ListSelectionModel , which is available to both JList , shown here, and JTable , shown here. The former has a flexible layout, while the latter has a convenient JCheckbox renderer/editor.

问题 Has anyone an example of implementing a JFreechart Dial chart on Coldfusion? Thanks 回答1: (This probably should not be a separate answer, but the other was already pretty long. So I am posting it separately to keep things organized and easy to find.) In case you are looking for what jFreeChart calls a MeterChart, here is a quick and dirty example of that chart type. MeterChart Code: <cfscript> // my chart settings chartTitle = "My Meter Chart"; arrowValue = 55; arrowUnits = "widgets";

问题 I'm trying to develop a Gantt chart in iReport , but the time range is displayed in months. I want it to be in date or week. Is this possible in iReport ? 回答1: I'm unfamiliar with ireport, but you may be able to use the approach shown here by specifying DateTickUnitType.DAY and the desired interval. A related example may be found here. 回答2: You can extend page width and the chart width to accommodate shorter ranges. The intervals automatically adjust to available page width. 来源： https:/

问题 I have implemented gantt chart using jfreechart. I want to know how can I get this chart accessed from client side. Also I do not want just image of the chart, I also want the zooming functionality alongside it. How to achieve this? Please help. 回答1: Can you please elaborate more? While minimally interactive charts are possible in a servlet context, a fully interactive desktop application may be made available from the server via Java Web Start. Among the JFreeChart samples, the JWS demo best

问题 In Java project, I used JFreeChart 1.0.19 version and XYPlot to draw lines on plot. I want scale xAxis (Date axis) as date in example - 10:00:05, 10:00:05, 10:00:10, 10:00:15…—scaling for every 5 seconds. But now when user start with 10:00:03 time, it looks as 10:00:03, 10:00:08, 10:00:13, 10:00:18… I want that always be scaled of 5 seconds as 10:00:05, 10:00:05, 10:00:10, 10:00:15 and be independently of start time, how to set it? I configurated domain axis(time axis) as below: domainAxis

问题 I'm creating a BarChart that contains multiple frequency bands as the category axis. What I want to do is to show a visible grouping of these frequency bands: For example: Freq x1 ~ Freq x2 = Band y (so the domain axis has values for category x1, x1.1, x1.2 till x2) Freq x3 ~ Freq x4 = Band z (x3, x3.1 .....x4) What I want to do is show markers for Band Y and Band Z in the graph. Note that based on the dataset that I may get, not all categories may be present. Say, for the 1st example, I've