462 Topics
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 | Reflect on your experience with object-oriented programming (OOP) in Java. Discuss how concepts like inheritance, polymorphism, and abstraction have helped you in your projects. Share examples and personal insights. |
| | I have a web page that loads images with a modal, and at the same time is meant to inhibit image piracy by delivering a transparent overlay when a user attempts to make a screen copy of the image. I have two php lines of image scripts which work OK …  |
| | I've read tutorial on tutorial and I try to work with Object Oriented PHP but the thing is that I find it rather complex. When I create a class I must include it in the current working document. It doesn't work as in Java when the compiler finds the script … |
| | I have a program that i need to convert from java to c++... i just need help doing it... heres the java: [code] /* Name: Joseph Coleman Class:CSCI 1302 Assignment: Employee + ProductionWorker Academic Honesty: The integrity of students and their written and oral work is a critical component of … |
 | vbScript - Create a Log File Using vbScript Classes Before I retired I was responsible for most of the corporate data plumbing at our control centre. All of the plumbing was written in vbScript. As any maintenance programmer knows, log files are a vital key in identifying and fixing problems. … |
| | Hi All, i am curious to know how to set the value (value=10) through B's constructor in below programme. below is example of multiple inheritance. As construction always happens from right to left so it always call the 'C' class's constructor and set the value 20 but as per my … |
| | Firstly, I would like to apologize for the massive number of nooby crap questions that come out of my account. I'm an emerging programmer that doesn't always know what he's doing, so I'm sorry. Secondly, the problem. I'm writing this code: class Object(): def __init_(self, vertices, color, name): self.color = …  |
 | inheritance error is::Error 1 Inconsistent accessibility: base class 'person' is less accessible than class 'employee' using System; using System.Collections.Generic; using System.Linq; using System.Text; //person class public class person { public string name; public double CNIC_no; public void Information() { Console.WriteLine("Enter your name"); name = Console.ReadLine(); Console.WriteLine("Enter your id"); CNIC_no =double.Parse( …  |
 | just curious. <img src="filepath.jpeg" id="idhere?" /> or <img id="idhere?" src="filepath.jpeg" /> which is valid? are they both vaild? and differences? |
| | Hello. We're going into Constructora and super, using extends, subclasses etc. I have this code: class Student { private String name; private String matric_no; public Student(String n, String m) { name = n; matric_no = m; } } class UndergradStudent extends Student { private String programme; public UndergradStudent(String n, String … |
| | [CODE]# -*- coding: utf-8 -*- from PyQt4 import QtGui from PyQt4.QtCore import * import sys import os class VideosToMp3(QtGui.QWidget): def __init__(self, parent = None): super(VideosToMp3, self).__init__(parent) ''' Labels and GUI ''' extension = QtGui.QWidget() download_label = QtGui.QLabel("Enter YouTube video URL:") self.download_line_edit = QtGui.QLineEdit() file_label = QtGui.QLabel("Enter file name (optional):") self.file_line_edit … |
| | Hi,all I need a java parser for parsing any java file in any package,not only existing file ...Can i do this ? how?  |
| | Hi, in this code how can I calculate coupling between objects CBO in java after parsing java file using registerCoupling method and retrieve any coupling between classes through argument, class name,type and so on .....  |
 | If I implement an abstract class that contains this method: private void MyMethod(string awesomeParameter, int aBigNumber) { // something cool happens here! throw new NotImplementedException(); } can I change it to this without breaking the implementation? private void MyMethod(string myParam, int myInt) { // something cool happens here! throw new …  |
| | Using an initialization list for a class array variable, what do you use to setup a slot with a 3parameter Ctor?  |
 | Is there a way to require a subclass to call super explicitly in it's constructor? |
 | Hello guys i have a really dumb problem i have two classes the first class is where the input value needs to be applied/readed and the second is where is inputed i do not know how to do that please someone help me This is where it is inputed the … |
| | Inheritance with generic types can sometimes be tricky. If you would inherit from a Stack<double>, no problem, but what if you want to keep it as generic as possible? Maybe it's a bad idea, but I wrote something like `class Stacker<T> : Stack<T>` and in Stacker I implemented some arithmetic …  |
| | Hi, As we know constructor doesn't have any return value so it is not good idea to perform exceptional handling inside constructor.SO i would like to know if i am opening a file inside constructor and due to some reason (file not exist) failure happened inside constructor then how to … |
| | Hey guys! I have a quick question that I think is a simple mess up. I am trying to make a console word game in c#, and I have different classes, and a main class that calls those classes. I first have the Player class, and the CreateCharacter class. My … |
 | I have a Task class (superclass) which inherited PracticeTest class(childclass). I'd faced question regarding my pass year question. In fact, we are allowed to declared like this Task aTask = new PracticeTest(); But i wonder why we are doing this way? Thanks for advance explanation. |
| | Is it possible to let an overridden method from a base class to return the type of the derived class? What I mean is: namespace test //with some "pseudo" code { class Base<T> { //fields ... //properties ... // ... public virtual Base<T> BaseMethod() { //return new Base<T>; } // …  |
| | Hi guys, I would like to discuss my design with one query. below is the code snippet. It is clear from below code snippet that class pd is privately derived from AbstractClass as both are different classes and there is no relation between them.Now in my class pd i need … |
| | Hey everyone, Got 2 questions here that i'm hoping will be answered. Say i have 2 variables int iValue; int iValueArray[300]; and later on init. them in the constructor Banana::Banana(): ival(0), ivalArray() {} 1. What would the ivalArray() indicate? Would it be the same as initializing every element to null/empty? … |
 | Greetings, I'm working on a class project for fractions and I'm stuck and cannot figure out where to go from here. We have a mandatory driver file we aren't supposed to change. See below for example output and the output I am actually getting. **Sample Output** Enter numerator; then denominator. …  |
| | Here is my code: ` #include <iostream> #include <iomanip> #include <string> using namespace std; class Register { //Private members private: //Creating an array for all the Prices static double Price[]; //Declaring RegNUM and RecNUM int RegNUM, RecNUM; //Print out Item name in a loop static string items[]; //Creates a Receipt … |
| | The tools Hal’s sells are: Hammers: $10.99 Wrenches: $10.99 Levels: $19.99 Tape Measures: $4.99 Screwdrivers: $8.99 In order to make things easier in the long run you have decided to make a c++ program that takes in all the orders for each register and tallies them at the end of … |
 | Hi all, I'm trying to access a list in a class made in another class and display it in a listbox but its not working. I most probably have to make a small change to be able to get it to work. So please check in the code if you …  |
| | Hi fellow members, I have wrote two abstract classes, with the second inheriting from the first. However, I receive this error when I try to compile: "error C2143: syntax error : missing ',' before '<'." Will somebody help me out? Thanks! template <class DataType> class AbstactArrayClass { friend ostream& operator …  |
| | //Hi all just switching from c++ to c#.Can anyone help,with the question i have: //this is a peace of code from c++ banking aplication int ShowMenu(void); void AddAccount(vector<CAccount*>& list); void DisplayAccount (vector<CAccount*>& list); void Lodgement (vector<CAccount*>& list); void Withdroawal (vector<CAccount*>& list); void InterestRate (vector<CAccount*>& list); CAccount* findAccount (vector<CAccount*>string ); bool … |
| | Why this doesn't work? class Faculty extends Employee { private long[] officeHours; private String rank; public Faculty(long[] hours, String rank) { this.officeHours = hours; this.rank = rank; } public static void main(String[] args){ //some code here Faculty f = new Faculty(newToken[], tokens[tokens.length-1]); |
 | One of my students make me a question (which answer i know) but I think could be instructive to formulate the same question here so many people can learn about it. The question is: How to implement a copy assignment into a Derived class? Consider the following class A: class … |
| | Kind of stuck here. I'm porting over a section of code from Java to C#, and I'm having an issue with method permissions constructors. Early in my code, i have this class.. public class TCard { int suit; int rank; } and later i've got this method, which throws a … |
| | i read adapter classes everything is write but i am confuse about Listener Interfaces and Adapter classes concept priblem is that when java create adapter classes it implements corresponding interface and privide defination with empty bodies of all methods that are present in interface this is declaration public class WindowAdapter … |
 | I know this has been asked before, but I can't find any simple answers for a noob like me in C#. What exactly is a static method. I mean what does it mean to be static vs. nonstatic. I know in the code with the main method we use `public … |
| | Hey everybody, As of this moment i'm trying to work out how to approach a state design. I've come across Source Makers' site [http://sourcemaking.com/design_patterns/state/cpp/1](http://sourcemaking.com/design_patterns/state/cpp/1) and am testing out the example. The program works fine when it's all in 1 file, although i had to change some stuff in main, but … |
 | Hello programmers! I have been working on a hardware store application, where there is a `HardwareRecord`class that stores information about each object in a store (ex: nuts, bolts, screws, and so forth). Here's my declaration of this class: // HardwareRecord.h // Initialize Hardware Store File // // // Definition of … |
| | this program is simply for recording data of various staffs.Inheritance has been used for taking additional data.Staff is the base class.the classes officer,typist and teacher are the derived classes.again the classes regular and casual are derived from the class typist. **now my problem is that whenever i call the constructor … |
| | I'm trying to create a program that passes arguments of size of three shapes, a circle, a triangle, and a rectangle. I got those but everytime I run the code it displays the arguments as 0 instead of giving me the shape dimension. Here is the code. using System; class …  |
| | I am not sure why my program isn't writing to the text file. When I start the program it tells me that the file opens. Then I call the functions that are inherited from other classes and I would assume that it would write to the file and then display …  |
 | #include<iostream.h> #include <stdlib.h> //FOR exit(1) struct Flight { char flightNo[5]; char date[12]; char time[6]; char gate[3]; }; Flight flight={"AB11","10-12-2008","20:30","RT"}; struct Seat { char name[40]; char booking_ID[3]; int seats; }; Seat choice[4][5]; void displaymenu(); void booking(); void seat(); void ticket(); void records(); void menu(); void exit(); //Variables int selection,i,j,password; int seats_num[20]={0}; … |
 | Hi guys, I have small problem with my example code. Any hint? #include <iostream> using namespace std; class A{ public: int a; A(int i){a = i;} A(const A& rhs) // copy constructor { a = 2; } A(const A&& rhs) // move constructor { a = 3; } }; void … |
| | You cannot determine whether a ctor is being called on an object that is to become const. Such as: const Foo bar( another_foo ); // no way to determine in the ctor that bar will be const I'd like some sort of function attribute for copy constructors to determine if … |
| | I have two classes A Dog class whose constructor does not accept arguments, `public class Dog<pet> extends Animal<pet>{}` whose constructor does not accept any arguments and `public class Animal<pet>{}` whose constructor accepts one argument public class Dog<pet> extends Animal<pet>{ public Dog(){ super(/*what should go here?*/); //Constructor accepts no arguments } …  |
 | please i have a little problem creating a class and making it run. The class is created separately as a header file with it's source code. whenever i build the source code of the class, i get an error that says: undefined reference to 'WinMain@16'. And whenever I run the … |
| | I have been programming for quite a while in Python but have just started to learn OOP properly. I find it really confusing and I don't really understand it. Especially the implicit self that python automatically passes. It just isn't clicking, really. May someone provide an easy explanation of what …  |
 | how do I run a python class without creating an object |
 | Hello every one, What i need to do is to make an array of my own class and then assign values to that array I made an array and when i try to assign value it gave me an exception Your support is highly appreciated. static void Main(string[] args) { … |
| | I had a programme to write for college in Java. I have missed the class so I won't be getting marked on it but wanted to get it done as I have an exam next we. I am really stuck. I have to create a costInsurance () method taking in … |
 | Trtying to figure out how to add 5 different methods into this class when the program already does all that is required but my prof will knock me if I dont put them in here, do thet need to be put in as private?  |
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