Scala class to implement two Java Interfaces - how?

Question

I have just started learning Scala and I'm now wondering how I could implement two different Java interfaces with one Scala class? Let's say I have the following interfaces written in Java

public interface EventRecorder {     public void abstract record(Event event);  }  public interface TransactionCapable {     public void abstract commit(); } 

But a Scala class can extend only one class at a time. How can I have a Scala class that could fulfill both contracts? Do I have to map those interfaces into traits?

Note, my Scala classes would be used from Java as I am trying to inject new functionality written in Scala into an existing Java application. And the existing framework expects that both interface contracts are fulfilled.

Answer 1

The second interface can be implemented with the with keyword

class ImplementingClass extends EventRecorder with TransactionCapable {   def record(event: Event) {}   def commit() {} } 

Further on each subsequent interface is separated with the keyword with.

class Clazz extends InterfaceA   with InterfaceB   with InterfaceC {   //... }