problem about extends-Collection of common programming errors
rekire
java inheritance reflection override extends
I want to replace a function of a class where I know the source code. The problem is that I cannot override the function because it’s private and also I cannot extend the class and override the whole functionallity because the bad calles are in every possible constructor.Now I’m totally lost I don’t know how I can implement that desired functionallity (theming the controls of the Android VideoView controls aka MediaController). Is there any way to replace a function with reflection or something
Adrian Iftode
c# asp.net class extends inherit
I have something like this:C:\Users\%USER%\Desktop\MyProject (includes a solution file) \Sample (includes a project file) C:\Users\%USER%\Desktop\MyProject (includes a solution file) \Sample\src (includes Request.cs file)\web (includes web page stuff)folder ‘web’ contents: Default.aspx Default.aspx.csLets say I have a String sayHello = “Hello”; in Request.cs file.How could I “take” that string to my web page (into Default.aspx.cs file)?regards,user1223227
dimas
java generics extends
I received an error and I have this structure in my programpublic interface Shapes<T>{ //methods here }public class ShapeAction<T> implements Shapes<T>{ //Methods and implementations here }public class Circle extends ShapeAction<T>{ //Some methods here }The error is pointing at class Circle extends Shapes<T> where it says “T cannot be resolved to a type”. If I set T to string the error will go away but that also means I can only use one datatype. What should I put insi
Snukker
java inheritance final extends
In java, is there ever a case for allowing a non-abstract class to be extended?It always seems to indicate bad code when there are class hierarchies. Do you agree, and why/ why not?
cool mr croc
java android serialization extends implements
I need to serialize a list of GeoPoints then read them back in. I searched the web and found out that I can implement my own GeoPoint and implement serializable. It works and I can write the object to a .ser file but when i read it back in i get an invalidclassexception, which goes on to say detail message – illegalaccessexception of the original GeoPoint object. I assume I’m not extending GeoPoint in MyGeoPoint class properly. could someone take a look and tell me where I’m making the error?imp
Lpc_dark
java constructor this extends
In java i have a class A which extends class BI want to assign all of the contents from class B to class A thing is i want to do it from inside class A now this seems reasonable easy to do just transfer all of the variables.This is the hard part. I didn’t make class B it’s a part of android.widget In c++ you would just take in class b and then assign to *this and cast it.How would i go about doing this in java?To further clarify it’s a relativelayout i need to copy all the contents of a relative
supergiox
java override subclass superclass extends
My app has a structure similar to this:class Father{ a(){ … }b(){a();} }class Son extends Father{ a(){ ….. }} //overrideb() is not overrided. When I create an instance of Son and I call b(), Father’s a() is called, but I would like it executes the Son one (if the object is a Son). Is it possible?
Kohler Fryer
android button view merge extends
Is it possible to add a button to a class that extends View? “”public class josh extends View “” If not how can I merge a button onto the view when it is referenced in my main activity? uhg please help….
user733172
java reflection extends
Imagine that I have two Class A and B, B extends A, likeclass B extends A {…. }However, in my case, Class A is encrypted and can be only loaded by my ClassLoader at runtime (at compiling time, A.class can not be recognized as a .class file because it is encrypted). This means Class A doesn’t exist at compiling time. My questions are:how can write the code for Class B, as some methods override the methods in Class A? how can I specify Class B extends to Class A at runtime?
Benjamin M
database spring hibernate enums extends
we’ve got the following situation in our application:We have UserGroups These can be created by the user The user can map some Users to a given UserGroup (n:m relationship)Now we need some special UserGroups which we can access in Java Code. So when it’s all done, the user should see a mix of his own created UserGroups and our hard coded groups (which of course cannot be deleted).The first idea was to put those extra groups in the database when it’s created and simply rely on the fact that they
Andrew Wyld
java android imageview extends
I am trying to test a class I have created that extends ImageView. It crashed on construction, apparently before running any code (stepping through with the debugger didn’t reach any breakpoints in the construction code). As a sanity check I created this class:package com.blah.thing;import android.content.Context; import android.util.AttributeSet; import android.widget.ImageView;public class DoNothing extends ImageView {public DoNothing(Context context) {super(context);// TODO Auto-generated c
Seth McClaine
javascript jquery extends
I’m trying to create a button class that extends an abstractcomponent class using $.extend() but the functions in abstractcomponent arent available when im constructing the button. The specific error im receiving is:Uncaught TypeError: Object [object Object] has no method ‘setOptions’ var Button = {}; var abstract = new AbstractComponent; $.extend(Button,abstract); //debugger; //this.setOptions is available here Button = function(options) {‘use strict’;var defaultOptions = {templateName: ‘#butto
Trki
symfony2 controller containers extends
FOSUserBundle profile controlleruse Symfony\Component\DependencyInjection\ContainerAware;class ProfileController extends ContainerAwaresome functions ok … but when i try then creat form$form = $this->createFormThis error appear: Call to undefined method ProfileController::createForm() BUT when i change it to this:use Symfony\Bundle\FrameworkBundle\Controller\Controller; class ProfileController extends ControllerThe form is rendered… so … i dont know how can i add this controller to my c
Manic
javascript inheritance extends
I’ve been experimenting with various ways to emulate classical inheritance in Javascript, and I’ve found some ways to do it. However, I was curious why I couldn’t do it one particular way, and how I could try to work around it.I’ve tried this:var squeaker = new squeek();function monsterMaker(newMonster) {newMonster.type = “monster”;newMonster.health = 10;return newMonster; }function squeek() {this.name = “squeek”;this = monsterMaker(this); }I think I understand why this is happening, and I have
Jigar Joshi
java object extends
I m new in Java and I have a simple problem:I have the following class Point:public class Point {private int yAxis;private int xAxis;public Point (int x, int y){xAxis = x;yAxis = y;} }I created a new class that extends class Point. I want my new class to take as arguments two objects Point. I wrote the following code but I receive the error “Implicit super constructor MyPoint() is undefined. Must explicitly invoke another constructor”. How can I fix the problem?Thanks in advance! public class Re
Aurelio De Rosa
php class extends
I have two classes: The first class – Database – handles all the database actions, i.e., insert, update, delete. The other handles class specific actions for the user. The user class extends the database class. The User class has all of the attributes in it and am trying to get the methods from the Database class to perform actions on the attributes from the User class. So I’m instantiating User in test.php:<?php require_once(“user.php”); $user = new User();$user->auth(“Scott”, “rascal”);
benipsen
backbone.js coffeescript extends
I’m getting the error: Uncaught TypeError: Cannot read property ‘constructor’ of undefined When declaring the following class:class ViewHelpers extends Backbone.EventsI can use the same syntax to extend Backbone.Router, Views, Model etc. Here is the compiled javascript which I wrote in a quick log to make sure Backbone.Events was there__t(‘views’).ViewHelpers = (function(_super) {#how i know it is definied hereconsole.log(_super.trigger)__extends(ViewHelpers, _super);function ViewHelpers() {retu
Phil Jackson
php class extends
Hi I have a question regarding $this.class foo {function __construct(){$this->foo = ‘bar’;}}class bar extends foo {function __construct() {$this->bar = $this->foo;}}would $ob = new foo(); $ob = new bar(); echo $ob->bar;result in bar??I only ask due to I thought it would but apart of my script does not seem to result in what i thought.
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