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