Capturing low-level network data can be hard in Java, but it s certainly not impossible
If you want to capture network packets in your Java program, you ll need a little help because no parts of the core Java APIAPI give access to low-level network
It is about spline word,please refer to this chapter and analysis ,then
you will find how to draw spline ,if you have any problem,please contact me,my telephone is "none",haha!