Scala :如何将类字段传递到方法中

class MyClass {
  val myField = "Hello, world!"

  def myMethod(field: String): Unit = {
    println(field)
  }
}

val obj = new MyClass()
obj.myMethod(obj.myField) // 输出：Hello, world!

class MyClass {
  val myField = "Hello, world!"

  def myMethod()(implicit field: String): Unit = {
    println(field)
  }
}

val obj = new MyClass()
implicit val field: String = obj.myField
obj.myMethod() // 输出：Hello, world!

class MyClass {
  val myField = "Hello, world!"

  def myMethod(callback: String => Unit): Unit = {
    callback(myField)
  }
}

val obj = new MyClass()
val callback: String => Unit = (field: String) => println(field)
obj.myMethod(callback) // 输出：Hello, world!