Scala constructor overload?

Question

How do you provide overloaded constructors in Scala?

Answer 1

As of Scala 2.8.0 you can also have default values for contructor- and method parameters. Like this

scala> class Foo(x:Int, y:Int = 0, z:Int=0) {                           
     | override def toString() = { "Foo(" + x + ", " + y + ", " + z + ")" }
     | }
defined class Foo

scala> new Foo(1, 2, 3)                                                    
res0: Foo = Foo(1, 2, 3)

scala> new Foo(4)                                                          
res1: Foo = Foo(4, 0, 0)

Parameters with default values must come after the ones with no default values in the parameter list.