【面向对象】宽接口、窄接口和访问方法(上)
封装 封装、继承和多态是面向对象“三大金刚”。这其中封装可谓三大金刚之首。封装(或称信息隐藏)亦即不对使用者公开类型的内部实现手段,只对外提供一些接口,使用者只能通过这些公开的接口与类型进行交谈。 封装不好实际上继承和多态也是无稽之谈,即使不无稽也会风雨飘摇,使用者可能绕过你精心构造的对象层次,直接...
访问iframe文档对象时“拒绝访问”错误
For posting AJAX forms in a form with many parameters, I am using a solution of creating an iframe, posting the form to it by POST, and then accessing...
使用VBA访问iframe中的对象
To the point: 要点: I have successfully used VBA to do the following: 我已成功使用VBA执行以下操作: Login to a website using getElementsByName使用getElementsByName登录网站...
为什么我不能通过JavaScript中的键访问JSON对象?
This is my JSON object: 这是我的JSON对象: { text: 'stuff', user: 'user1} when I run a typeof jsonObj, I get object. When I run an jsonOb.length, I get unde...
我可以通过索引访问CoreData对象吗?
I'm using CoreData as a persistent store for my app data but would like to access elements in my data model by index rather than iterating through the...
Android - 如何访问嵌套对象?
I know this question has been brought up quite often, but so far I didn't really find an answer... 我知道这个问题经常被提出来,但到目前为止我还没找到答案...... I am trying to us...
我可以访问上一页的对象吗?
I've used PreviousPage Property to access the controls of the previous page but how can I access objects and instances of classes I initiated in the p...
如何访问java中对象数组中对象的变量
I am working on game development in android 我正在研究android中的游戏开发 I have a class called droid in my model package and i have a constructor called update(...
如何从Powershell访问正在运行的Internet Explorer实例的经典Internet Explorer COM自动化对象?
How do I access the classic Internet Explorer COM automation object for a running instance of Internet Explorer? That is, if I have Internet Explorer ...
Silverlight 3 - 访问TreeView项的父对象
I'm using a TreeView along with a HierarchicalDataTemplate to display a Hierarchical listing returned from a webservice. Depending on search criteria,...
如何使用jquery从ajax结果(json对象)访问数据
So I have this function that gets the user details via UUID; 所以我有这个函数通过UUID获取用户的详细信息; function getUserDetails(uuid){ $.ajax({ url:'http://loca...
如何在移动时访问SKSpriteNode子类的对象(Swift)
I am confused with the objects of my class Card that is the subclass of SKSpriteNode. How do I get access to these objects when a user move them. So f...
Java 匿名对象 内部类 包的声明与访问 访问修饰符
匿名对象: 匿名对象创建 匿名对象调用方法 package com.oracle.demo01;public class test { public static void main(String[] args) { //匿名对象创建 n...
Java多线程基础——对象及变量并发访问
在开发多线程程序时,如果每个多线程处理的事情都不一样,每个线程都互不相关,这样开发的过程就非常轻松。但是很多时候,多线程程序是需要同时访问同一个对象,或者变量的。这样,一个对象同时被多个线程访问,会出现处理的结果和预期不一致的可能。因此,需要了解如何对对象及变量并发访问,写出线程安全的程序,所谓线程...
访问基类的方法与派生类的对象,该对象具有相同名称的方法。
when accessing foo() of "base" using derived class's object. 当使用派生类的对象访问“base”的foo()时。 #include <iostream>class base{ public: void fo...
使用其对象访问类的私有成员变量(实例)
Here is a VB.NET code snippet 这是一个VB.NET代码片段 Public Class OOPDemo Private _strtString as String Public Function Func(obj as OOPDemo) as boolean ...
是否根据访问私有成员的具体对象被认为是不良做法?
I'm wondering if it was considered a bad practice, or something that breaks the rules of OOP, the fact of according an access to a private member to a...
为私有成员|动态访问对象名称值的java反射getFields
I want to print all of the class's properties with their name and values. I have used reflection, but getFields give me length of 0. 我想打印类的所有属性及其名称和值。...
无法从Objective-C访问Swift 4类:“在类型对象上未找到的属性”
Using the latest Xcode 9 beta, I'm seemingly completely unable to access properties on Swift classes. Even odder, I can access the class itself to ins...
Java:从远处的对象访问方法的最佳方式
I'm currently working on my first larger java project (a game) and I'm having a bit of an organisation issue already with only a few (~40) classes. I'...