Top "Implements" questions

extends and implements in one class in TypeScript

Can I do this in TypeScript? export interface IMyInterface { doSomething(): void; } export class MyBaseClass { myBaseClassHasProperty: string; constructor(){ this.myBaseClassHasProperty = 'some …

typescript extends implements

How to force implementation of a method in subclass without using abstract?

I want to force subclass to implement an implemented method of my mother class. I look this Java - Force …

java class methods abstract implements

Implements Comparable to get alphabetical sort with Strings

I would like an object to be comparable (to use it in a TreeSet in that case). My object got …

java interface comparable implements alphabetical-sort

implementing Comparable interface from abstract class with concrete subclasses

package geometricobject; public abstract class GeometricObject implements Comparable { private String color = "white"; private boolean filled; private java.util.Date dateCreated; …

java interface comparable implements

Since a class in Java cannot extend multiple classes. How would I be able to get by this?

I have two classes that need to extend one class. I am getting a compiler error since this cannot happen …

java class interface extends implements

Class incorrectly implements interface 'OnChanges'. Property 'ngOnChanges' is missing in type

I basically started using angular 4 and and working with the ngChanges I'm getting this error Class 'GalleryComponent' incorrectly implements interface …

angular oop implements

Delphi interface implements

I would expect that the reference counting should work on the outer aggregating object in an interface implementation. If I …

delphi interface delphi-2007 implements

java.lang.Number doesn't implement "+" or any other operators?

I'm creating a class which is supposed to be able to be used with an array of any type of …

java numbers operators add implements

How to call a service's method on ngOnInit with multiple components/routes

I have several routes that are nothing more than a static page. On each of these routes (over 50) I have …

angular implements

why can a class implement multiple interfaces?

This is the only question about interfaces in oop I can't seem to fully explain. So again, why in oop …

class oop inheritance interface implements