Question

How can I declare java interface field that implement class should refine that field ?

for example

public interface IWorkflow{
    public static final String EXAMPLE;// interface field 
    public void reject();
}

// and implement class
public class AbstWorkflow implements IWorkflow
{
    public static final String EXAMPLE = "ABCD"; /*MUST HAVE*/
    public void reject(){}
...
}

Thank you.

Answer 1

See section 9.3 of the specification. There is no overriding of fields in interfaces – they are just hidden in some contexts, and ambiguous in others. I’d just stay away. Instead put a getter in the interface (getEXAMPLE())