thread « Development « JFreeChart Q&A

1. threading problem jfree.org

Hi, I currently have an application which generates several cluster load charts (1 for each cluster). So I thought of generating each of these charts in seperate threads: 1 thread per chart, taking care of keeping the threads independant (data wise). Each thread works independantly; creates a dataset, puts the data in it and then draws the chart. I have a ...

2. Creating Chart and Threading jfree.org

My createChart class creates faster than processing queries (due to large database, query takes some time to return the processed result to createChart class) thus i get nullpointerexception most of the time... Any help on this? How do i implement threading in this case? Any sample on applying threading to create chart (not sample on threading pls... i got tonnes..)?

3. Exception in thread "Thread-4" jfree.org

Hi, I create new project, import every jar from old project and this code is work , but no work this code JFreeChart chart = ChartFactory.createBarChart( VERTIKAL, // chart title "Item", // domain axis label "Value", // range axis label dataset, // data PlotOrientation.VERTICAL, true, // include legend true, false ); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... // ...

4. thread "main" NoClassDefFoundError jfree.org

I have added jcommon and jfreechat into my classpath. I can compile java file, but I can't run it. Please help me. my .bashrc file is: # .bashrc # User specific aliases and functions # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi export ANT_HOME=/home/software/apache-ant-1.6.5 export PATH=/home/software/j2sdk1.4.2_10/bin:$ANT_HOME/bin:$PATH export AXIS_HOME=/home/software/axis-1_3/lib export AXIS_LIB=$AXIS_HOME/axis-ant.jar:$AXIS_HOME/axis.jar:$AXIS_HOME/axis-schema.jar:$AXIS_HOME/commons-discovery-0.2.jar:$AXIS_HOME/commons-logging-1.0.4.jar:$AXIS_HOME/jaxrpc.jar:$AXIS_HOME/log4j-1.2.8.jar:$AXIS_HOME/saaj.jar:$AXIS_HOME/wsdl4j-1.5.1.jar export CLASSPATH=$AXIS_LIB:/home/software/axis-1_3/lib/activation.jar:/home/software/axis-1_3/lib/mailapi.jar:. export GLOBUS_LOCATION=$HOME/ws-core-4.0.1/ export JFREECHART_HOME=/home/users/selv/jfreechart-1.0.1/lib ...

5. Background thread for drawing a chart jfree.org

Background thread for drawing a chart by caa Sun Jul 02, 2006 2:59 am I wrote a little proxy around the JFreeChart.draw method. It kicks off the drawing onto a seperate thread. It seems to work pretty good, I'd like to hear what other people out there think of it. I had originally done this by making my own version ...

6. Note that JFreeChart does not yet use thread synchronisation jfree.org

Hello, I have a problem with synchronization. I have a JFreeChart on a ChartPanel which displays values comming from a seperate thread. I also implemented Drag and Drop support to make it possible to add a curve at runtime. So I drop the curvename on the panel and most of the time the curve is added and everthings fine. Sometimes the ...

7. constructing JFreeChart in different thread than main thread jfree.org

8. Loading data in a thread jfree.org

9. JFreechart and thread safety jfree.org

JFreechart and thread safety by arwelbath Fri Mar 07, 2008 4:15 pm Hi, I have a chart which gets updated periodically. Occasionally, these updates can happen very quickly (i.e. some values can be changed using a JSlider which can result in some very fast updates). When this happens, I periodically get the folowing... Code: Select all Exception in thread "AWT-EventQueue-0" ...

10. problem displaying dynamic chart (and thread??).. jfree.org

problem displaying dynamic chart (and thread??).. by q25 Sun Mar 30, 2008 2:46 am I am experimenting with JFreeChart to create charting program that plots a line chart, by feeding it an xy data point (item) one at a time (to simulate dynamic chart drawing). I generate a set of random XYDataItem objects, and pass it one-by-one to the method ...

11. MultiThreading support jfree.org

12. Multithreading support for JFreeChart jfree.org

Hi Thanks for your reply.As you r saying JFree chart is not thread safe. But my out put is in the form of images(PNG and JPG) And i hav created one thread Application where 3 threads parellaly calling three diff types of charts, 200 times and it is working so is thr any threading issue with image as output waiting for ...

13. Updating / redrawing a chart from within a Thread - how? jfree.org

Hello I'm trying to add some random data to series (XYseries) and update a chart every desired amount of time from within a thread. Here is my code: Code: Select all Runnable plotUpdater = new Runnable() { public void run() { for (int i = 0; i < 100; i++) { ...

14. Multithreading jfree.org

It's been a while since I have done threading in Java and my memory might need refreshing. I have several charts that I add to one panel. I create each chart in a separate thread, but I have found that my CPU peaks at 50% (dual-core machine). I think I remember that there is only one Swing thread. I also remember ...