I hope your question is more of accessing class static variables/methods in another class. If so, yes you can.
public class TestStatic
{
public static int x =10;
}
public class YourClass
{
public void yourMethod()
{
int yourVar = TestStatic.x;
}
}
If you are referring accessing static inner classes, here is a good discussion static inner class discussion
solved How can i access static class without using object in android? [closed]