Hey guys, junior here `Car` is a class, which extends an abstract class `Vehicle` I didn't write a ...

# android

[Ofir Bar]

Hey guys, junior here
Car is a class, which extends an abstract class Vehicle

I didn't write a constructor for Vehicle . why the compiler complains?

[Zach Klippenstein (he/him) [MOD]]

It just means you need to put () after Vehicle, which is a constructor invocation

[Zach Klippenstein (he/him) [MOD]]

All classes have constructors. If you don’t explicitly write one, they have an implicit default constructor.

[Ofir Bar]

But Vehicle is an abstract class. How is it possible that it has an implicit constructor? @Zach Klippenstein (he/him) [MOD]

[Zach Klippenstein (he/him) [MOD]]

There’s lots of information about this on the web. Kotlin takes its behavior from Java for this. Here’s some links:

https://beginnersbook.com/2013/05/java-abstract-class-method/

https://stackoverflow.com/questions/260666/can-an-abstract-class-have-a-constructor

https://www.geeksforgeeks.org/abstract-classes-in-java/

[Ofir Bar]

Thanks a ton @Zach Klippenstein (he/him) [MOD]

[Zach Klippenstein (he/him) [MOD]]

Also you might want to check out #getting-started