jfreechart

I am using JfreeChart to create dynamic charts. Currently, am facing a problem to create a Chart to show dynamic Date time values from database. Showing above picture, I want to fix Y axis with months JAN to Dec. Since long back trying , but I could not find any solution. Please give me the solution to fix above issue Catalina Island Use a DateAxis , like they show here , and format the labels for months. DateAxis axis = (DateAxis) plot.getDomainAxis(); axis.setDateFormatOverride(new SimpleDateFormat("MMM")); 来源： https://stackoverflow.com/questions/40280364/jfreechart-dynamic-date-time-values

I wanted to add to the chart a scroll bar in order to view big datasets which did not fit on the screen, because to keep all xtick. However, I got the following error message: Exception in thread "main" java.lang.ClassCastException: org.jfree.data.xy.XYSeriesCollection cannot be cast to org.jfree.data.category.CategoryDataset at MySlidingCategoryDatasetDemo3$DemoPanel.<init>(MySlidingCategoryDatasetDemo3.java:86) at MySlidingCategoryDatasetDemo3.createDemoPanel(MySlidingCategoryDatasetDemo3.java:112) at MySlidingCategoryDatasetDemo3.<init>(MySlidingCategoryDatasetDemo3.java:107) at

Is it possible to get complex, beautiful colors for pie charts in JFreechart? I mean how can I achieve the colors like the image shown in the link ? Is it possible using the RGB format, or do you need to use a different format? How can we do it. thank you for your help You can specify the color using RGB values for each slice of the pie with PiePlot.setSectionPaint . Here is an example : DefaultPieDataset result = new DefaultPieDataset(); result.setValue("1", 40.); result.setValue("2", 30.); result.setValue("3", 20.); result.setValue("4", 10.); JFreeChart chart = ChartFactory.createPieChart3D(

On the X axis my data points(20 of them) take values between 0 and 0.2. My X axis should have range from 0 to 1. On the Y axis corresponding values are between 0.8 and 0.86. When I plot this graph using NumberAxis in JFreeChart I get very dense graph especially in the interval X belongs to 0.01 to 0.02.(so I can't see much) Is it meaningful to use log scale for X axis in this case? How should I adjust LogAxis in JFreeChart here? To use LogAxis , just create the axis and set it as the plot's domain: LogAxis xAxis = new LogAxis("X"); plot.setDomainAxis(xAxis); LogAxisDemo1 , shown among the XY

I need to create a XYLineChart with values from database. I see this: public class Test { public static void main(String[] args) { XYSeries series1 = new XYSeries("Lions"); series1.add(20, 10); series1.add(40, 20); series1.add(70, 50); XYSeries series2 = new XYSeries("Rabbits"); series2.add(20, 30); series2.add(40, 40); series2.add(70, 10); XYSeriesCollection xyDataset = new XYSeriesCollection(); xyDataset.addSeries(series1); xyDataset.addSeries(series2); JFreeChart chart = ChartFactory.createXYLineChart("Weight","kg","Numbers",xyDataset,PlotOrientation.VERTICAL,true,false,false); chart