www.jfree.org

I found that TimePeriod is very useful,such as Day,Month,Hour,Minute. With TimePeriod, I found a convenience way to display date in domain axis. However, I couldn't find a TimePeriod which represent quarter of an hour and the Quarter TimePeriod delegated quarter of a year. I wrote a class named MinQ...

First, after I read the api doc of jfreechart, I found that JFreeChart implements java.io.Serializable,but when I use ObjectOutputStream.writeObject(Object) to write the JFreeChart, the program stopped with java.io.NotSerializableException. so I read the source, to my surprise, it does not implement...