extends Questions
4
Solved
Here is what I know:
Double is a subtype of Number and List<Double> is not a subtype of List<Number>.
List<Dog> is not a subtype of List<Animal> because you can add Cat to...
1
Solved
Can I do this in TypeScript?
export interface IMyInterface {
doSomething(): void;
}
export class MyBaseClass {
myBaseClassHasProperty: string;
constructor(){
this.myBaseClassHasProperty = 'so...
Odoric asked 30/3, 2015 at 0:5
6
Solved
As I understand the inherited class should also inherit variables, so why doesn't this code work?
public class a {
private int num;
public static void main(String[] args) {
b d = new b();
}
}...
Stanch asked 15/2, 2013 at 9:54
4
Solved
i have a java beginner question:
Parent.print() prints "hallo" in the console,
but also Child.print() prints "hallo".
I thought it has to print "child".
How can i solve this?
public class Parent {...
Soviet asked 15/11, 2010 at 19:33
5
Solved
After trying to understand the concepts at Spring MVC, I came across the expression Collection<? extends Book> which I have never seen before. I have tried to figure it out on my own, but I a...
2
Solved
The following statements:
URLClassLoader ucl = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class<URLClassLoader> uclc = ucl.getClass();
fail with error:
Type mismatch: cannot con...
Mixedup asked 9/6, 2014 at 8:11
3
Solved
A friend of mine found this tidbit in the Java API (https://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html),
Class Enum<E extends Enum<E>>
and by reading the following article...
3
Solved
Is it possible to create something like this in java
public abstract class GenericView<LAYOUTTYPE extends AbstractLayout> extends LAYOUTTYPE
so that
public class MyView extends GenericVi...
2
I am using phpstorm as IDE. And in my class.php, I started the class as
class MyClass extends Database{
function sample(){
$this->query();
}
}
the query() is in the class Database. But php...
1
Solved
Assuming I have a 'base' class such as this:
class CcDefinition {
// Some properties here
constructor (json: string);
constructor (someVar: number, someOtherVar: string);
constructor (jsonOrS...
Patchwork asked 2/10, 2014 at 5:45
4
Given a simple class …
public class Parent {
private final String value;
public Parent(String value) {
this.value = value;
}
@Override
public String toString() {
return value;
}
}
… ...
5
Solved
i'm using codeigniter for my project and i have this class model which i call Genesis which looks like this:
class Genesis_model extends CI_Model {
function __construct() {
parent::__construct()...
Holcomb asked 4/7, 2011 at 8:56
2
Solved
Given:
import java.util.*;
public class Hancock {
//insert code here
list.add("foo");
}
}
Which two code fragments, inserted independently at line 5, will compile without warnings? (Choose t...
Twist asked 21/7, 2014 at 9:30
4
Solved
Question
How can you extend a python property?
A subclass can extend a super class's function by calling it in the overloaded version, and then operating on the result. Here's an example of what...
Steal asked 18/2, 2014 at 4:15
4
Solved
So I am reading about generic method and I am get confused. Let me state the problem here first:
In this example: Suppose that I need a version of selectionSort that works for any type T, by using...
Dover asked 10/12, 2013 at 15:3
2
Solved
I looked around for a similar issue but couldn't find anything that matched it.
I'm trying to extend the built-in JSONObject to add some functionality, like so:
public class MyJSONObject extends...
2
I've been trying to override a compareTo in such a way:
This is the original:
@Override
public int compareTo(ProductPart6 s)
{
return this.getproductName().compareTo(s.getproductName());
}
thi...
Gompers asked 25/11, 2013 at 23:32
3
Solved
What is the difference between these two methods?
Collection<Type> getTypes();
vs
Collection<? extends Type> getTypes();
Does it matter if Type is a class or an interface?
Especi...
2
Solved
Java provides me by <? extends class> a way of filtering the java classes that you can use to
build in this case the new HashMap, for example:
I can do that:
Map<String,? extends Seriali...
Omentum asked 18/7, 2013 at 12:16
3
Solved
public class Base {
//long list of attributes
// no Constructor using fields
// no init methode
// i cannot change this class
}
now i extended the Base Class like:
public class subClass ext...
Management asked 4/4, 2013 at 4:2
1
Solved
I have 2 class:
class animal{
public function walk(){
walk;
}
}
class human extends animal{
public function walk(){
with2legs;
}
}
This way, if i call human->walk(), it only runs with2leg...
3
Solved
I'm working with a Java API used for "macros" that automate a piece of software. The API has, among other things, the classes Simulation (a global state of sorts) and FunctionManager. There's nothi...
Sahaptin asked 29/5, 2013 at 12:37
2
Solved
{{ dump(extend) }}
Result:
boolean false
And when I want to make this:
{% if extend is true %}
{% extends 'WelcomePageBundle:Default:welcome_page.html.twig' %}
{% endif %}
It doesn't wo...
Cyrillus asked 26/2, 2013 at 12:5
3
I tried to extend the UserManager of FOS according to this link
My service is correctly detected but i have an error i can't resolved :
ErrorException: Catchable Fatal Error: Argument 1 passed to...
Sleepwalk asked 21/3, 2012 at 14:14
5
I've been using this site for about 6 months now, and its time to ask my first question, because I cant find the answer to this, atleast not an answer that I can understand!
In this bit of code, w...
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