RungKutta有现成的java class,调用就好了,关键看你要算什么
如果只是实现KungKutta Method,照抄就可以了。作业有那么难吗?
These tew links might help:
http://www.ee.ucl.ac.uk/~mflanaga/java/RungeKutta.html
http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Physics/Chapter04/RungeKutta2nd.html