jfreechart

I am using JFreeChart to display a value for each day of a month. Now I want to have my x-axis display the weeks in a month instead of the days. At the moment the values for my graph are double on the y-axis and int on the x axis. Timestamp ts = a.getTimestamp(); Double val = a.getVal(); series1.add(ts.getDate(), val); I am using plot.getDomainAxis().setRange(0, 31); to set the range for the days to one month and xax.setTickUnit(new NumberTickUnit(7)); for the x-axis to display the ticks at the right position. Instead of displaying the days (0, 7, 14, 21, 28) i want them to be weeks (0, 1, 2,

I am using Struts2. I need to display JFreeChart in a web page. Can any body help me on that? Edit: it is getting displayed in binary format. public String execute() throws Exception { System.out.println("Refresh bar Chart"); response.setContentType("image/png"); OutputStream outstream = response.getOutputStream(); try { JFreeChart chart = getChartViewer(); ChartUtilities.writeChartAsPNG(outstream, chart, 500, 300); System.out.println("Created bar Chart"); return SUCCESS; } finally { outstream.close(); response.flushBuffer(); } } You can convert your charts to images and include them in your

I am developing a javaEE application using jfreecharts. I successfully displayed my data using a stackedBarChart but the column keys (Y-axis labels) are not fully displayed because they are too large. how can I display them vertically? thanks for your suggestions Catalina Island You can use setCategoryLabelPositions() like they show here . CategoryPlot plot = (CategoryPlot) chart.getPlot(); CategoryAxis domainAxis = plot.getDomainAxis(); domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_90)); 来源： https://stackoverflow.com/questions/16317373/display-column-keys-of-stacked-bar-chart

I have the following values to be shown in a BAR chart in my Java web application. 9.46373791E8 9.45942547E8 9.45559945E8 9.45187023E8 9.44856693E8 9.44417826E8 9.44007878E8 As u can see the values are really close and have minor differences. When i generate a bar chart using Jfreechart, all the bars appear almost the same height and there is no way of telling the difference visually. So i want to change the (0,0) to (0,9)so that x axis is at number 9 on y axis. I still want to show the real values that the bars represent somewhere on top of the bar. please suggest ideas. i tried the below but

I need to change the default DateTickUnit settings for different zoom levels for a TimeseriesChart, but can´t find the place i need to read in the documentation? I would greatly appreciate a pointer. Here is the Java API for TimeSeriesChartDemo1: http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/demo/TimeSeriesChartDemo1.html The zoom levels documentation will be found in one of the inherited methods. I would recommend finding the exact component that requires the zoom to be changed on. Then checking the API for that java.awt component DateAxis has two static factories for creating