Real Time Charts

news918 · Post by **news918** » Fri Jul 27, 2007 3:55 pm

Hi,

I like to know what is the best aproach to show information in real time. By real time I mean 10 or 15 seconds.

The main idea is to get data from a database and constantly show it in a TimeSeries chart.

TIA.
Julio

Post by **david.gilbert** » Tue Jul 31, 2007 4:46 pm

If you display the chart in a ChartPanel, it will automatically update when the dataset is changed. So you need to write some code that uses a timer to fetch the latest values from the database periodically and insert them into the dataset...just be aware that JFreeChart is not thread-safe, so you should update the dataset from the event dispatch thread to ensure that the dataset doesn't change halfway through repainting the chart (which can cause some odd exceptions sometimes).