1. public class Base {2.   public static final String FOO = "foo";3.   public static void main(String[] args) {4.    Base b = new Base();5.    Sub s = new Sub();6.    System.out.print(Base.FOO);7.    System.out.print(Sub.FOO);8.    System.out.print(b.FOO);9.    System.out.print(s.FOO);10.    System.out.print(((Base)s).FOO);11. } }12. class Sub extends Base {public static final String FOO="bar";}