Question

In java document, it is said :

Unlike interfaces, abstract classes
can contain fields that are not
static and final, and they can contain
implemented methods.

Is that a correct text? that not part confuses me because interfaces don’t have static or final fields, right?

Source : http://download.oracle.com/javase/tutorial/java/IandI/abstract.html

Thanks.

Edit :

public interface GroupedInterface extends Interface1,
                                        Interface2, Interface3 {

   // constant declarations
   double E = 2.718282;  // base of natural logarithms

   // method signatures
   void doSomething (int i, double x);
   int doSomethingElse(String s);

}

An interface can contain constant
declarations in addition to method
declarations. All constant values
defined in an interface are implicitly
public, static, and final. Once again,
these modifiers can be omitted.

Answer 1

Click on “Defining an Interface” on the link in your question:

An interface can contain constant
declarations in addition to method
declarations. All constant values
defined in an interface are implicitly
public, static, and final. Once again,
these modifiers can be omitted.