instance

问题 I'm working on a project in C#. The previous programmer didn't know object oriented programming, so most of the code is in huge files (we're talking around 4-5000 lines) spread over tens and sometimes hundreds of methods, but only one class. Refactoring such a project is a huge undertaking, and so I've semi-learned to live with it for now. Whenever a method is used in one of the code files, the class is instantiated and then the method is called on the object instance. I'm wondering whether

问题 Hi can anybody please explain me why is this code snippet giving me StackOverflowError I really appreciate if you can explain what is happening when instanceObj initializing and calling ObjectTest constructor and java.lang.Object constructor. It seems to me ObjectTest constructor loop over and over.But I don't know exact reason? So any suggestion... public class ObjectTest { public ObjectTest() { } ObjectTest instanceObj = new ObjectTest(); public static void main(String[] args) { ObjectTest

问题 In a recent question, someone asked about static methods and one of the answers stated that you generally call them with something like: MyClassName.myStaticMethod(); The comments on that also stated that you could also call it via an object with: MyClassName myVar; myVar.myStaticMethod(); but that it was considered bad form. Now it seems to me that doing this can actually make my life easier so I don't have to worry about what's static or not (a) . Is there some problem with calling static

问题 In a recent question, someone asked about static methods and one of the answers stated that you generally call them with something like: MyClassName.myStaticMethod(); The comments on that also stated that you could also call it via an object with: MyClassName myVar; myVar.myStaticMethod(); but that it was considered bad form. Now it seems to me that doing this can actually make my life easier so I don't have to worry about what's static or not (a) . Is there some problem with calling static

问题 What is the difference between an Instance and an Object? Is there a difference or not? 回答1: An instance is an object in memory. Basically you create object and instantiate them when you are using them. Here is a nice writeup on Classes Vs Objects Vs Instances, he is talking Java but it applies to all OO. http://alfredjava.wordpress.com/2008/07/08/class-vs-object-vs-instance/ 回答2: The Instance and Object are from Object Oriented Programming. For the some programming languages like Java, C++

问题 What is the difference between an Instance and an Object? Is there a difference or not? 回答1: An instance is an object in memory. Basically you create object and instantiate them when you are using them. Here is a nice writeup on Classes Vs Objects Vs Instances, he is talking Java but it applies to all OO. http://alfredjava.wordpress.com/2008/07/08/class-vs-object-vs-instance/ 回答2: The Instance and Object are from Object Oriented Programming. For the some programming languages like Java, C++

问题 With this code "VB.Net 2005" Dim dep as new Department With dep.AddNewEmployee() .FirstName = "Mr. A" .LastName = "B" If TypeOf {dep.AddNewEmployee()'s instance} is Serializable then 'Do something End If end With in {dep.AddNewEmployee()'s instance} is there any syntax for this code. Is it possible? 回答1: There is no way to do that by using the With syntax. You could just add a local variable that references the new object though: Dim dep as new Department Dim emp = dep.AddNewEmployee() With

问题 I am trying to make a three tab desktop app where tab1: add/del button for adding/deleting 0-20 JButtons with tab2: user selectable color (JColorChooser) and tab3 for showing the statistics such as count of buttons in tab1 and the latest color. My problem: with good hint I received here (thanks to Hovercraft Full of Eels!) I managed to add a PropertyChangeListener, and actually that color is now showable background for the panel - whereas I'd want to use it for new JButtons. Also same way it

问题 Please excuse me if this question looks dumb for a regular java programmer but i'm stuck with this problem. I want to call the method getPoliticCards() from the class PoliticCard in the class DrawCard(Player player) . At first i used a static arraylist in PoliticCard so i had no problems, but i had to change it because i'm supposed to be able to run several sessions of the game at the same time. public enum Color { BLACK, PURPLE } public class Player { private int id; private ArrayList<Color>

问题 So I have an app built using Codeigniter and we are experiencing some trouble when a session is loaded and someone loads another URL that would start a session with the same app. The problem is that the second session is overwriting the initial session (at least partially) and corrupting the data being sent. We are using database sessions and encryption. Looking for help on this. Thanks in advance. 回答1: Here's a previous thread for you: Multiple PHP Sessions Another thing not mentioned in