{"id":4684,"date":"2014-03-30T14:44:22","date_gmt":"2014-03-30T14:44:22","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-extends-collection-of-common-programming-errors\/"},"modified":"2014-03-30T14:44:22","modified_gmt":"2014-03-30T14:44:22","slug":"problem-about-extends-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-extends-collection-of-common-programming-errors\/","title":{"rendered":"problem about extends-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/34e360a22c487af329ce7cdff6da2288?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nrekire<br \/>\njava inheritance reflection override extends<br \/>\nI 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&#8217;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&#8217;m totally lost I don&#8217;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/367533859e4a44885a26a9dff3f7ea05?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAdrian Iftode<br \/>\nc# asp.net class extends inherit<br \/>\nI 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 &#8216;web&#8217; contents: Default.aspx Default.aspx.csLets say I have a String sayHello = &#8220;Hello&#8221;; in Request.cs file.How could I &#8220;take&#8221; that string to my web page (into Default.aspx.cs file)?regards,user1223227<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/034e3665714777e721adbfba1bbff7c3?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ndimas<br \/>\njava generics extends<br \/>\nI received an error and I have this structure in my programpublic interface Shapes&lt;T&gt;{ \/\/methods here }public class ShapeAction&lt;T&gt; implements Shapes&lt;T&gt;{ \/\/Methods and implementations here }public class Circle extends ShapeAction&lt;T&gt;{ \/\/Some methods here }The error is pointing at class Circle extends Shapes&lt;T&gt; where it says &#8220;T cannot be resolved to a type&#8221;. 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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/64880244955f2f72d913397dd7d0a74c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nSnukker<br \/>\njava inheritance final extends<br \/>\nIn 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?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/9039907d4175a4779b2b790037ceb28c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ncool mr croc<br \/>\njava android serialization extends implements<br \/>\nI 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 &#8211; illegalaccessexception of the original GeoPoint object. I assume I&#8217;m not extending GeoPoint in MyGeoPoint class properly. could someone take a look and tell me where I&#8217;m making the error?imp<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/59ae819e78023d6c0763f5ae69a7fa14?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nLpc_dark<br \/>\njava constructor this extends<br \/>\nIn 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&#8217;t make class B it&#8217;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&#8217;s a relativelayout i need to copy all the contents of a relative<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/182b56917b81c25cafc910718e0500a0?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsupergiox<br \/>\njava override subclass superclass extends<br \/>\nMy app has a structure similar to this:class Father{ a(){ &#8230; }b(){a();} }class Son extends Father{ a(){ &#8230;.. }} \/\/overrideb() is not overrided. When I create an instance of Son and I call b(), Father&#8217;s a() is called, but I would like it executes the Son one (if the object is a Son). Is it possible?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/20bbf60f7c912a60191f106fe3384ba0?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nKohler Fryer<br \/>\nandroid button view merge extends<br \/>\nIs it possible to add a button to a class that extends View? &#8220;&#8221;public class josh extends View &#8220;&#8221; If not how can I merge a button onto the view when it is referenced in my main activity? uhg please help&#8230;.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/ddab4c0213ac7e339eb8b3af27bb8d1b?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser733172<br \/>\njava reflection extends<br \/>\nImagine that I have two Class A and B, B extends A, likeclass B extends A {&#8230;. }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&#8217;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?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8e15d0b76b751677703fab7fb20bec3d?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nBenjamin M<br \/>\ndatabase spring hibernate enums extends<br \/>\nwe&#8217;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&#8217;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&#8217;s created and simply rely on the fact that they<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2154bd6e447ca14e96782866c8c83bb4?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAndrew Wyld<br \/>\njava android imageview extends<br \/>\nI 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&#8217;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/4104af89c5e0f6dd775df0c315e96114?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nSeth McClaine<br \/>\njavascript jquery extends<br \/>\nI&#8217;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 &#8216;setOptions&#8217; var Button = {}; var abstract = new AbstractComponent; $.extend(Button,abstract); \/\/debugger; \/\/this.setOptions is available here Button = function(options) {&#8216;use strict&#8217;;var defaultOptions = {templateName: &#8216;#butto<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f1bd09a713a4cae4df72ad5848a552e9?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nTrki<br \/>\nsymfony2 controller containers extends<br \/>\nFOSUserBundle profile controlleruse Symfony\\Component\\DependencyInjection\\ContainerAware;class ProfileController extends ContainerAwaresome functions ok &#8230; but when i try then creat form$form = $this-&gt;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&#8230; so &#8230; i dont know how can i add this controller to my c<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/eb8f68f3558de6eaed3e9a92a3b26b1f?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nManic<br \/>\njavascript inheritance extends<br \/>\nI&#8217;ve been experimenting with various ways to emulate classical inheritance in Javascript, and I&#8217;ve found some ways to do it. However, I was curious why I couldn&#8217;t do it one particular way, and how I could try to work around it.I&#8217;ve tried this:var squeaker = new squeek();function monsterMaker(newMonster) {newMonster.type = &#8220;monster&#8221;;newMonster.health = 10;return newMonster; }function squeek() {this.name = &#8220;squeek&#8221;;this = monsterMaker(this); }I think I understand why this is happening, and I have<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/39acb52ff074bc477f0325f4b1960c90?s=128&amp;d=identicon&amp;r=PG\" \/><br \/>\nJigar Joshi<br \/>\njava object extends<br \/>\nI 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 &#8220;Implicit super constructor MyPoint() is undefined. Must explicitly invoke another constructor&#8221;. How can I fix the problem?Thanks in advance! public class Re<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8b01a8b4d7a0a9079a4e97b1ddedbe56?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAurelio De Rosa<br \/>\nphp class extends<br \/>\nI have two classes: The first class &#8211; Database &#8211; 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&#8217;m instantiating User in test.php:&lt;?php require_once(&#8220;user.php&#8221;); $user = new User();$user-&gt;auth(&#8220;Scott&#8221;, &#8220;rascal&#8221;);<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/4ebb0fa9cd6ab4ae91be725143710568?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nbenipsen<br \/>\nbackbone.js coffeescript extends<br \/>\nI&#8217;m getting the error: Uncaught TypeError: Cannot read property &#8216;constructor&#8217; 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(&#8216;views&#8217;).ViewHelpers = (function(_super) {#how i know it is definied hereconsole.log(_super.trigger)__extends(ViewHelpers, _super);function ViewHelpers() {retu<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/k3Myh.png?s=32&amp;g=1\" \/><br \/>\nPhil Jackson<br \/>\nphp class extends<br \/>\nHi I have a question regarding $this.class foo {function __construct(){$this-&gt;foo = &#8216;bar&#8217;;}}class bar extends foo {function __construct() {$this-&gt;bar = $this-&gt;foo;}}would $ob = new foo(); $ob = new bar(); echo $ob-&gt;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.<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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&#8217;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&#8217;m [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4684","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=4684"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4684\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=4684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=4684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=4684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}