¿Cómo extiendo una clase Java en Kotlin?

How do I extend a Java class in Kotlin?

Kotlin provides the ability to extend a class with new functionality without having to inherit from the class or use design patterns such as Decorator. This is done via special declarations called extensions. For example, you can write new functions for a class from a third-party library that you can’t modify.

Similar to using the fun keyword in Kotlin to create a new function, use the class keyword to create a new class. You can choose any name for a class , but it is helpful if the name indicates what the class represents. By convention, the class name is written in Upper Camel Case (also called Pascal Casing).

We can even create an object expression for an interface or abstract class by just implementing their abstract methods. This functionality is called an anonymous interface implementation or anonymous abstract class implementation.

In Java, you can do such thing as: class MyClass extends SuperClass implements MyInterface.

Thankfully, Kotlin comes to the rescue with extension functions and properties. Unlike the Java programming language’s equivalent, extensions appear in Android Studio’s autocomplete. Extensions can be used with third party libraries, Android SDK, or user defined classes.

A class can only extend (subclass) one parent. A comma-separated list of interfaces implemented by the class, if any, preceded by the keyword implements . A class can implement more than one interface.

Here is an example of how to extends a class in java. Here Hello calss extends Add class, so methods of Add class “addMethods” can use in Hello class with creating the object. You can also Java Extends interface, here is an example to how to do Extends Interface in Java. But remember Interface can “ extends ” only interface not class.

A class extending a class and implementing an interface with same methods ? (Beginning Java forum at Coderanch) A class extending a class and implementing an interface with same methods ? if a class extends another class and implements an interface both with the same method , which function will it implement ?? ? which show () does c implement ??

Me – Actually class B extends class Object, so when you extend class B in class A then class A extends class Object indirectly. This is multi-level inheritance, not multiple inheritance.

(Beginning Java forum at Coderanch) A class extending a class and implementing an interface with same methods ? if a class extends another class and implements an interface both with the same method , which function will it implement ?? ? which show () does c implement ?? thanks.