Scala example source code file (gosh.scala)

This example Scala source code file (gosh.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

app, foo, int, line, line, linefoo, point, point, shape, shapefoo, shapefoo, t, t, unit

The Scala gosh.scala source code

object ShapeTest extends App {

  class Point(x: Int, y: Int) {
    override def toString() = "[" + x + "," + y + "]"
  }

  abstract class Shape {
    def draw(): Unit
  }
    
  class Line(s: Point, e: Point) extends Shape {
    def draw() { Console.println("draw line " + s + "," + e) }
  }
    
  abstract class Foo {
    type T <: Object
 
    def show(o: T): Unit
    def print() { Console.println("in Foo") }
  }
    
  abstract class ShapeFoo extends Foo {
    type T <: Shape
    def show(o: T) { o.draw() }
    override def print() { Console.println("in ShapeFoo") }
  }
    
  class LineFoo extends ShapeFoo {
    type T = Line
    override def print() { Console.println("in LineFoo") }
  }
    
  val p1 = new Point(1,4)
  val p2 = new Point(12, 28)
    
  val l1 = new Line(p1, p2)

    
  val l = new ShapeFoo {  // ** //
    type T = Line  // ** //
    override def print() { Console.println("in LineFoo") } // ** //
  }
  l.show(l1) // ** //
}