Scala 学习笔记之函数(1)

class Student {

  val mySayHello1: String => Unit = sayHello
  val mySayHello2: (String, Int) => Unit = sayHello
  val myTalkTo = talkTo _
  val myJumpStart: () => String = jumpStart

  def sayHello(name: String) = {
    println("Hello 1, " + name)
  }

  def sayHello(name: String, age: Int) = {
    println("Hello 2, " + name + "," + age)
  }

  def talkTo(name: String, age: Int): Unit = {
    println("Talk to , " + name + "," + age)
  }
  
  def jumpStart(): String = {
    "Start to Jump"
  }

}

object FunctionDemo {

  def main(args: Array[String]): Unit = {
    val s = new Student()
    //操作标记法调用方法
    s sayHello "bill"
    //操作标记法调用方法
    s sayHello ("bill", 20)
    //函数类型赋值
    s.sayHello("bill")
    s.sayHello("bill", 20)
    //用通配符为函数赋值
    s.myTalkTo("bill", 10)
    //无输入参数函数赋值
    println(s.myJumpStart())

  }
}

Hello 1, bill
Hello 2, bill,20
Hello 1, bill
Hello 2, bill,20
Talk to , bill,10
Start to Jump