如何访问和改变scala中的私有字段？

class MyClass {
  private var privateField: Int = 10

  def getPrivateField: Int = privateField

  def setPrivateField(newValue: Int): Unit = {
    privateField = newValue
  }
}

val obj = new MyClass()
println(obj.getPrivateField)  // 访问私有字段
obj.setPrivateField(20)       // 修改私有字段
println(obj.getPrivateField)  // 输出修改后的私有字段值

import scala.reflect.runtime.universe._
import scala.reflect.runtime.currentMirror

class MyClass {
  private var privateField: Int = 10
}

val obj = new MyClass()

val mirror = currentMirror
val field = typeOf[MyClass].decl(TermName("privateField")).asTerm.accessed.asTerm
val fieldMirror = mirror.reflect(obj).reflectField(field)

println(fieldMirror.get)  // 访问私有字段
fieldMirror.set(20)       // 修改私有字段
println(fieldMirror.get)  // 输出修改后的私有字段值