Inheritance with Scala 'object'

I have this Java code:

class Super {
    public static void foo() { bar(); }
    public static void bar() { out.println("BAR");}

    public static void main(String[] args) {
        foo();
    }
}
class Sub extends Super {
    public static void bar() { out.println("bar"); }
}

And I would like to see what it does in Scala, but can't seem to find how to write the equivalent. This is what I have:

object Super  {
  def foo() { bar() }
  def bar() { println("BAR")}
  def main( args : Array[String]) {
    foo()
  }
}
object Sub extends Super {
  override def bar() { println("bar")}
}

But doesn't compile. It is because object can't inherit开发者_开发问答 ?

You might want to change it into something like this

class Super {
  def foo() { bar() }
  def bar() { println("BAR")}
  def main( args : Array[String]) {
    foo()
  }
}

object Super extends Super {
}

object Sub extends Super {
  override def bar() { println("bar")}
}

This way you have both the type Super and the object Super.

EDIT : Just moved the main method to class Super, that way it is cleaner.

You can only extend from classes. So you might wanna change Super to be a class instead of an object

Also, you need to add the override keyword to the method you plan to override.

See "Method Overriding" here