jfreechart

Is it possible to cast an image/BufferedImage to JFreeChart? Casting an image to JFree is not possbile. To create an image from JFreechart you can do the following: BufferedImage objBufferedImage=objJFreechart.createBufferedImage(600,800); ByteArrayOutputStream bas = new ByteArrayOutputStream(); try { ImageIO.write(objBufferedImage, "png", bas); } catch (IOException e) { e.printStackTrace(); } byte[] byteArray=bas.toByteArray(); This creates the byte[] . Now you need to create the image from byte[]. The following does this. InputStream in = new ByteArrayInputStream(obj); BufferedImage image =

I have made it possible for value labels to appear on top of the bar in JFreeChart. However, it would look better if the labels are inside the bars. How do I make this work? The image below shows what I wanted the graph to look like. I used the following code to make it work: StackedBarRenderer renderer = new StackedBarRenderer(false); renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); renderer.setBaseItemLabelsVisible(true); chart.getCategoryPlot().setRenderer(renderer);` Just specify the desired ItemLabelPosition in your CategoryItemLabelGenerator . BarChartDemo3

This is similar to a question I asked yesterday but more specific to the problem. What is the correct method to add a JFreeChart to a NetBeans project which already contains various widgets? My updateChart() hides the entire JFrame. I'd like to add the JFreeChart to the JFrame. public class MyClass extends javax.swing.JFrame implements TableModelListener { public MyClass() { initComponents(); ... updateChart(); } private void updateChart() { XYDataset dataset = createXYdataset(); JFreeChart chart = createChart(dataset); JPanel chartPanel = new ChartPanel(chart); setContentPane(chartPanel); }

I am using JFreeChart to draw a graph. The code is package com.daya; import java.awt.Color; import java.io.BufferedReader; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.InputStreamReader; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities

May be I could not phrase t the question right. Let me Explain I want to draw polar chart that starts the value from the zero and fill it to the desired point. When I plot graph it show something like this But I am looking for something like this Here is the sample Code import java.awt.Color; import java.awt.Dimension; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.PolarChartPanel; import org.jfree.chart.plot.PolarPlot; import org.jfree.chart.renderer.DefaultPolarItemRenderer; import org.jfree.data.xy.XYDataset;

I am trying to scroll my XYBarChart horizontally, I am following one of the JfreeChart's Demo "TranslateDemo1.java" in which the source code you can find here: http://code.google.com/p/cori-chenxx/source/browse/aliper/trunk/aliper-core/src/test/java/com/alibaba/aliper/TranslateDemo1.java?spec=svn148&r=148 The source code works fine for a "TimeSeriesChart". However I tried with "XYBarChart" and WHEN I SLIDE THE BAR the behavior is not the same. Just to be clear I replaced the line #157 with the following source code: JFreeChart chart1= ChartFactory.createXYBarChart( "Title", null, true, "Ylabel

I'm developing a web application which use JFreeChart to render chart. However, when server dose not have any Chinese font installed, JFreeChart dose not display Chinese character even if I have set the font. Then I write a small testing code and find out that add this line of code before drawing the chart can solve the problem. GraphicsEnvironment.getLocalGraphicsEnvironment().registerFont(font); So my questions are - Why do I have to register font into JVM even if I create my font from File ? Dose that mean JFreeChart do not use the font I set directly ? When I deploy my program into server,