Override Predef's implicit conversions

Question

I have multiple methods that return a java.lang.Integer, which is then implicitly converted to an Int using Scala's Predef implicit conversions, here is how it is written there:

implicit def Integer2int(x: java.lang.Integer): Int = x.intValue

This conversion is not satisfying to me, I would like something along the lines of:

implicit def Integer2int(x: java.lang.Integer): Int = 
  Option(x).getOrElse(new Integer(0)).intValue

as the Integer can sometimes be null and in that case Predef's implicit conversion returns null as well and I would like it to be 0 instead.

I wrote my own conversion but I keep getting errors saying that this declaration is ambiguous given that it is already declared in Predef.

My question is, is there a way to actually override Predef's implicit conversions?

Answer 1

You can disable the Predef import like this:

import scala.Predef.{Integer2int => _}

And then just redefine Integer2int as you wish.

Funny proof: http://ideone.com/R7Zyfd