interface

问题 I want to create an interface between an adapter and a view holder (this view holder is an inner class of another adapter) so that I can update the text view (number). How can I do this? In detail: I have two recycle views (Main List Recycler View and Sub List Recycler View horizontally placed as shown in the fig) one having a number (as one of its item) and other having checkbox (as its item). I have two adapters FilterMainListAdapter and FilterSubListAdapter with view holders

问题 I want to send Interface Ref of IVApplication from Visio Add-in to my other one COM server. But I have Ole exception. Now i do that: Code in Visio Add-in: var IStrm: IStream; hres: HResult; rhglobal: HGLOBAL; VisioAppl: IVApplication; begin hres := CreateStreamOnHGlobal(0, TRUE, IStrm); if Succeeded(hres) then hres := CoMarshalInterface(IStrm, IID_IVApplication, VisioAppl, MSHCTX_LOCAL, 0, MSHLFLAGS_NORMAL); if (Succeeded(hres)) then begin hres := GetHGlobalFromStream(IStrm, rhglobal); if

问题 I am new to spring Mvc and in a lot of tutorials, I found there is a Dao interface like this public interface StudentDAO { public List<Student> getStudents(); public void addEntry(Student student); public void updateEntry(Student student); public void deleteEntry(Student student); public Student getStudentById(int id); } and also services like this public interface StudentService { public List<Student> getStudents(); public void addEntry(Student student); public void updateEntry(Student

问题 GENERIC INTERFACE : interface ICloneable < T > { T CopyFrom (T source); T CopyFrom (T source); T CopyTo (T destination); } CLASS : Implements generic interface: public class Entity: ICloneable < Entity > { public int ID { get; set; } public Entity CopyFrom (Entity source) { this.ID = source.ID; return (this); } } WINDOWS FORM : This form should only accept T types that implement the above generic interface. public sealed partial class Computer < T >: System.Windows.Forms.Form { private T

问题 Here is the code I'm having problems with: The interface: public interface anInterface { void printSomething(); } Class that implements the interface: public class aClass implements anInterface { public aClass() { } public void printSomethingElse() { System.out.println("Something else"); } @Override public void printSomething() { System.out.println("Something"); } } And the main function: public static void main(String[] args) { anInterface object = new aClass(); object.printSomething(); //

问题 Okay, so I'm trying to teach myself django by trying to put together a simple DB query application. So I have in my DB a relation mysql table storing triples (RDF, subj, obj, pred) and I have written a model form with the fields to query that. Though, I have initially setup my form to store the queries in a separate table. What I would like to do however, is the model form I created to instead query the triple table. Here is my code: view: from django.shortcuts import render, get_object_or

问题 This question already has answers here : Protected in Interfaces (16 answers) Closed 3 years ago . I have an interface and 2 classes that implement this interface. See the code below as example. addAchievedMilestone is a method that needs to be implemented in every class, but can only be executed by a class in the same package. Why can't the method addAchievedMilestone be protected? I want it to be protected so it can only be used by classes in the same package. (The method won't be extended

问题 I am trying to implement factory class and interface. But i am getting the below error message. I have created a factory class which decides which class to return NormalTaxManager or ImportedTaxManager. I have provided the abstraction using interface. #include<iostream> #include<vector> using namespace std; class TaxInterface { public: virtual int calculate_tax(int price,int quantity)=0; }; class TaxFactory { public: // Factory Method static TaxInterface *callManager(int imported) { if

问题 I want to bring 3 sensor variables that change all the time to my python interface. I am trying with this test code, it does not work, what am I doing wrong? Arduino: void setup() { Serial.begin (9600); } void loop() { Serial.print(random(1,3)); Serial.print(random(3,5)); Serial.print(random(5,7)); } Python: canvas.create_text(190, 150, text=ser.readline(1), fill="gray", font="Helvetica 45 bold",tag="T1") How can I get multiple variables updating all the time? right now I am just getting the

问题 This feels like a silly question, but it aggravates me as I don't understand where the methods are declared. In my code I can do things like (obviously this is a bit pseudo code) ResultSet rs = DB.getConnection.sendSQL(select * from [table]) I understand that the sending of the SQL returns a 'result set' and although a 'ResultSet' is only an interface the returned object implements that interface. My question is how does the returned object implement that interface? From what I read interface