Confusing AnyRef equals

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I found that subj returns false for the same object. It is a terrible 
mistake for me

case class a(i:Int)
{
  override def canEqual(a: Any) = a.isInstanceOf[Int]

  override def equals(o:Any) = AnyRef.equals(o)

  override def hashCode = AnyRef.hashCode
}

val aa = new a(1)
aa == aa //false


Am I right? )

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<div dir=3D"ltr">I found that subj returns false for the same object. It is=
 a terrible mistake for me<div><br><div><pre style=3D"color: rgb(0, 0, 0); =
font-family: &quot;Courier New&quot;;"><span style=3D"color:#000080;font-we=
ight:bold;">case class </span>a(i:Int)<br>{<br>  <span style=3D"color:#0000=
80;font-weight:bold;">override def </span>canEqual(a: Any) =3D a.isInstance=
Of[Int]<br><br>  <span style=3D"color:#000080;font-weight:bold;">override d=
ef </span>equals(o:Any) =3D <span style=3D"color:#660e7a;font-style:italic;=
">AnyRef</span>.equals(o)<br><br>  <span style=3D"color:#000080;font-weight=
:bold;">override def </span>hashCode =3D <span style=3D"color:#660e7a;font-=
style:italic;">AnyRef</span>.hashCode<br>}<br><br><span style=3D"color:#000=
080;font-weight:bold;">val </span>aa =3D <span style=3D"color:#000080;font-=
weight:bold;">new </span>a(<span style=3D"color:#0000ff;">1</span>)<br>aa =
=3D=3D aa <span style=3D"color:#808080;font-style:italic;">//false</span></=
pre><pre style=3D"color: rgb(0, 0, 0); font-family: &quot;Courier New&quot;=
;"><span style=3D"color:#808080;font-style:italic;"><br></span></pre><pre s=
tyle=3D"color: rgb(0, 0, 0); font-family: &quot;Courier New&quot;;"><span s=
tyle=3D"color:#808080;font-style:italic;">Am I right? )</span></pre></div><=
/div></div>

<p></p>

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