[JAVA] abstractg class calling abstract method in constructor

[temp temp]

     
       
      I have a super  class  with an abstract method and a non  default 
constructor and it calls this abstract method in its constructor
       This abstract method is implemented in the  base class.
      First thing  base class constructor does is call  super()   
       
      Example
      // super  class
      public abstract class CustomRuntimeDocument extends  AbstractDocument {
       
            public  CustomRuntimeDocument(XmlObject aXmlObject, String 
aFileName   ) {
                  super();
                  fXmlObject=aXmlObject;
                  fFilename=getFilePrefix()+aFileName;
            }
       
      protected abstract String getFilePrefix();
       
       
      } // end of class
       
      // base class
      public class CustomRuntimeFormDocument extends  CustomRuntimeDocument{
            
            public  CustomRuntimeFormDocument(Form   aForm  , String aFileName) 
{
                  super(aForm,aFileName);
                  fForm=aForm;
            }
       
            protected String  getFilePrefix() {
                  
                  return "formbuilder_";
            }
       
      }
       
       
      Is this ok or might generate some problems ?
      Thanks & Regards
    
 
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