java base-07-keyword static

import static

It’s not a good way to extends static members from super class. like this code in struts2.

 public class ActionSupport {
     public static String SUCCESS = "success";
     public static String ERROR = "error";
 }

common

 public class StaticAction extends ActionSupport {
     public static void main(String[] args) {
         System.out.println(SUCCESS);
     }
 }

elegant

 import static com.ryo.dao.ActionSupport.*;
 
 public class StaticImport {
     public static void main(String[] args) {
         System.out.println(SUCCESS);
     }
 }

• import static