动态类加载 - NON-JDBC，通用：“找不到符号方法”

I have some coded that analyzes data, and I've realized that I'd like to have a bit of code that's tailored to the very specific source of the data, rather than generic processing. Any individual source may change with time, and there are already several different sources to consider. To handle this case, I was launching, from Java, complete stand-alone programs, and that's nice, but there are some problems with that and I decided I have some coded that analyzes data, and I've