problem with math code

I am trying to write a little snippet of code and keep getting an error. I am sure it its to do with how i am working the one line of math.java lang

please look and help me understand what i am writing backwards.

Thanks

importstatic java.lang.Math.*;

publicclass Geometry

{

publicstaticdouble SphereVolume(double radius)

{

double volume = 0;

double PI = 3.145;

radius =0;

double c = 4/3;

volume = c(PI)radius.exp(3);

return volume;

}

}

This is the error i get:

-jGRASP exec: javac -g C:\Users\Jessie\Documents\java\class lab assignments\lab 7\Geometry.java

Geometry.java:25: ';' expected

volume = c(PI)radius.exp(3);

^

1 error

[1288 byte] By [jrb47a] at [2007-11-27 1:36:50]