public static void enrollStudent(String firstname, String lastname, int grade, String phonenumber, boolean criminalrecord)
  {
    StudentRecord newStudentRecord = new StudentRecord(firstname, lastname, grade, phonenumber, criminalrecord);  
    if (initial != null) 
    {
    StudentRecord searchResult = searchByName(firstname, lastname);
	newStudentRecord.nextLink (searchResult.nextStudentRecord());
	searchResult.nextLink = newStudentRecord;

    } else {
    	
        initial = newStudentRecord;
    	newStudentRecord.nextLink(null);	
    }
    
  }
  
   
   //Performs a search for the name
   private static StudentRecord searchByName(String firstname, String lastname)
   {
   boolean foundpos = false; 
	StudentRecord current = initial;
   
            while ((current.nextStudentRecord () != null) && !foundpos) //Start the search
            {
                
                if (lastname.compareTo ((current.nextStudentRecord ()).returnlName ()) > 0) //Compare the entry and the existing    
                {
                    
                    current = current.nextStudentRecord (); //Advance to the next one
                                                                        
                } else { 
                
                    foundpos = true; //or indicate the position is found
                                
                }
                
            }
			return current;
		
                
   
    }