scala_类的继承

 1 class Point(val xc: Int, val yc: Int){
 2   var x: Int = xc
 3   var y: Int = yc
 4   def move(dx: Int, dy: Int): Unit ={
 5     x = x + dx
 6     y = y + dy
 7     println("x点的坐标是：" + x)
 8     println("y点的坐标是：" + y)
 9   }
10   
11   var name = ""
12   override def toString = getClass.getName + "[name=" + name + "]"
13 }

 1 class Location(override val xc: Int, override val yc: Int,
 2                val zc: Int) extends Point(xc, yc){  // 继承   重写了父类的字段
 3   var z: Int = zc
 4   def move(dx: Int, dy: Int, dz: Int){
 5     x = x + dx
 6     y = y + dy
 7     z = z + dz
 8     println("x点的坐标是：" + x)
 9     println("y点的坐标是：" + y)
10     println("z点的坐标是：" + z)
11   }
12   
13   var salary = 0.0
14   override def toString = super.toString + "[salary=" + salary + "]"
15 }

 1 object Test{
 2   def main(args: Array[String]): Unit = {
 3     val loc = new Location(10, 20, 30)
 4     loc.move(10, 10 ,5)、
 6     loc.name = "lc"
 7     loc.salary = 35000.0
 8     println(loc)
 9   }
10 }