Inheritance reflection wat

gistfile1.scala

scala> abstract class FooClass(val foo:String)
defined class FooClass

scala> class ExtendsFoo(override val foo:String = "foo!") extends FooClass(foo)
defined class ExtendsFoo

scala> val foo = new ExtendsFoo()
foo: ExtendsFoo = ExtendsFoo@3b40500e

scala> foo.foo
res11: String = foo!

scala> foo.getClass.getField("foo")
java.lang.NoSuchFieldException: foo
        at java.lang.Class.getField(Class.java:1579)
        at .<init>(<console>:16)
        at .<clinit>(<console>)
        at .<init>(<console>:11)
        at .<clinit>(<console>)
        at $print(<console>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:704)
        at scala.tools.nsc.interpreter.IMain$Request$$anonfun$14.apply(IMain.scala:920)
        at scala.tools.nsc.interpreter.Line$$anonfun$1.apply$mcV$sp(Line.scala:43)
        at scala.tools.nsc.io.package$$anon$2.run(package.scala:25)
        at java.lang.Thread.run(Thread.java:745)