trait Similarity {
	def isSimilar(x: Any): Boolean
	def isNotSimilar(x: Any): Boolean = !isSimilar(x)
}
 
class Point(xc: Int, yc: Int) extends Similarity {
	var x: Int = xc
	var y: Int = yc
	def isSimilar(obj: Any) = 
		obj.isInstanceOf[Point] &&
		obj.asInstanceOf[Point].x == x
}
 
object TraitsTest extends Application {
	val p1 = new Point(2, 3)
	val p2 = new Point(2, 4)
	val p3 = new Point(3, 3)
	println(p1.isNotSimilar(p2))
	println(p1.isNotSimilar(p3))
	println(p1.isNotSimilar(2))
}
 

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