Scala example source code file (traits.scala)

This example Scala source code file (traits.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

any, any, bordered, bordered, borderedcoloredshape, borderedcoloredshape, color, colored, int, shape, shape, test

The Scala traits.scala source code

object Test {
  type Color = Int
  trait Shape {
    override def equals(other: Any) = true
  }
  trait Bordered extends Shape {
    val thickness: Int
    override def equals(other: Any) = other match {
      case that: Bordered => this.thickness == that.thickness
      case _ => false
    }
  }
  trait Colored extends Shape {
    val color: Color
    override def equals(other: Any) = other match {
      case that: Colored => this.color == that.color
      case _ => false
    }
  }
  trait BorderedColoredShape extends Shape with Bordered with Colored {
    override def equals(other: Any) = other match {
      case that: BorderedColoredShape => (
	super.equals(that) && 
        super[Bordered].equals(that) && 
        super[Colored].equals(that))
      case _ => false
    }
  }

  val bcs1 = new BorderedColoredShape {
    val thickness = 1
    val color = 0
  }
  val bcs2 = new BorderedColoredShape {
    val thickness = 2
    val color = 0
  }
  Console.println(bcs1 == bcs1)
  Console.println(bcs1 == bcs2)
}