scala基础15-抽象（类、字段、方法）

/*
* 定义抽象类和java一样，使用abstract关键字
* 抽象类中的成员（变量、方法）不需要初始化或占位符站位，也不需要加abstract
*/
abstract class SuperTeacher(val name: String) {
var id: Int
var age: Int
def teach
}

/*
* 和java一样，实现抽象类，使用extends关键字
*/
class TeacherForMaths(name: String) extends SuperTeacher(name) {
override var id = name.hashCode()
override var age = 29
override def teach {
println("Teaching...")
}
}

object Test {
def main(args: Array[String]): Unit = {
val teacher = new TeacherForMaths("tom")
teacher.teach

println("teacher.id: " + teacher.id)
println(teacher.name + " : " + teacher.age)
}
}