Is static inner class thread safe?

[Bruce Jin]

We know static variables are not thread safe. How about static inner class?
This is an example:

  
public class Myservlet extends HttpServlet {
 
  public void doGet(HttpServletRequest request, HttpServletResponse response) {
 
     AnInner an = new AnInner();
     an.method();
     ...
 
  }
 
  public static class AnInner { 
     private int a;
     public void method() {�}
     ....
  }
}
  

[Gregg Bolinger]

This question isn't really specific to the Servlet API so I am going to move it to our Java in General (Intermediate) forum.