interface

问题 I am now writing wrappers for C++ functions, such that they can be used from C code. The idea is to compile the cpp files using g++ and the c files using gcc, then link them together (!), but exposing ONLY those functions that are needed, to the C programs, by making them available in a header file 'test.h' (or maybe test.hpp?), like so: (Note how I do not expose function 'vector Tokenize(const string& str,const string& delimiters)') test.h: /* Header can be read by both C+ and C compilers,

问题 All variables inside of interface are public static and final. So if I declare a nested class inside an interface will it also become static and final? Interface I { class c { static void m(){ } } } 回答1: Lets find out. Lets create structure like: interface Interface{ class Foo{} } Now we can test: System.out.println("static: " + Modifier.isStatic(Interface.Foo.class.getModifiers())); System.out.println("final: " + Modifier.isFinal(Interface.Foo.class.getModifiers())); which prints: static:

问题 I'm writing a database interface in Google Go. It takes encoding.BinaryMarshaler objects to save and saves them as []byte slices, and it loads data into encoding.BinaryUnmarshaler to return it: func (db *DB) Get(bucket []byte, key []byte, destination encoding.BinaryUnmarshaler) (encoding.BinaryUnmarshaler, error) { I want to implement being able to load an arbitrary length slice of encoding.BinaryUnmarshaler s in one go (for example "load all data from a bucket X"). I want the function to be

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . I started my programming life not long ago. It is said that if you combine data and algorithm together, then you got a program. That is exactly what I do now, yet I hear these theories: Build for today, design for tomorrow Before coding, make each module as clear as possible Your code should not be

问题 I need to develop an application which has a interface which implements methods of 3 protocols. Assume protocol A extends protocol B and protocol C, and interface implements protocol A. This is how my code looks, // This is in MyClass.h file #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> #import "protocol_A" @interface MyClass : NSObject <protocol_A> { } @end //This is MyClass.m file #import "MyClass.h" @implementation myClass -(void)methodinA { NSLog(@"I'm in protocol_A"); } } -

问题 I created an interface so I can set text on a FragmentB when I press a TextView on FragmentA. Something is not working and I can't figure this out. I've created an interface called Communicator: public interface Communicator { void respond(String data); } On FragmentA I've set a reference on the interface called Communcator and an OnClickListener on the TextView: Communicator comm; homeTextView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { comm

问题 Hey I try to pass an ArrayList with the Interface method between two Fragments in one activity. The logcat says there are no errors, but the item I added the ArrayList in the one Fragment is not shown in my Spinner in the other Fragment . I will post my whole code, so if you see my problem, it would be nice if you explain me the solution. Thanks in advance. MainActivity.java package de.kwietzorek.fulcrumwebview; import android.app.Activity; import android.support.v4.app.Fragment; import

问题 I'm writing a little functional programming piece of code. I have an interface, and a class which has a function that gets an implementation of that interface as a param. public interface Statement { T executeTStatement(); } public class StatementExecutor { public static<T> T executeStatement(Statement statement) { T result; try { . . result = statement.executeStatement(); . . } catch..... finally.... return result; } } So the StatementExecutor class and executeStatment function in class are

问题 I am creating a COM (User Control) in C# to be used in Excel-VBA. It compiles without error and I can register it on my machine. In this COM I have the property declared like this stdole.IFontDisp Font_Test { get; set; } But in the VBA, the return type automatically gets changed to stdole.StdFont So in VBA it becomes stdole.StdFont Font_Test Why is this automatic type conversion is happening and how can I fix this? Thanks! Edit: As per Hans's answer I checked the type library and yes it gets

问题 I'm trying to create and interface of generic type methods, then implement them in a subclass and so on. But I cannot figure out why my subclass throws an error that says I have not overridden the abstract method from my interface. Code is as follows: package stdmathops1; public interface StdMathOps1<T>{ public <T> T div(T f, T s); } //this is all very simple and not the whole of it, at this point I'm just //trying to figure out why it won't override the div method. class Fraction implements