將對象添加到Scala中的可變列表

Question

我一直在嘗試將數據添加到Scala中的可變列表中。

由於Alvin Alexanders出色的博客文章使用ListBuffer類，因此我可以添加基本的數據類型 ，但是當涉及對象時，我不太確定如何進行操作，因此請不要將其標記為重復。

import scala.collection.mutable.ListBuffer

var fruits = new ListBuffer[String]()
fruits += "Apple"
fruits += "Banana"
fruits += "Orange"

所以，我嘗試這樣映射：

import scala.collection.mutable.ListBuffer
var fruits = new ListBuffer[MyClass]()
var d1=new MyClass("data1","data2","data3")

fruits += d1

這給出了以下錯誤：

type mismatch
found: MyClass
required: MyClass

有人能幫我一下嗎？

Answer 1

無法復制：

Welcome to Scala version 2.10.2 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_25).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :paste
// Entering paste mode (ctrl-D to finish)

import scala.collection.mutable.ListBuffer
var fruits = new ListBuffer[MyClass]()
class MyClass(a:String, b:String, c:String)
var d1=new MyClass("data1","data2","data3")
fruits += d1

// Exiting paste mode, now interpreting.

import scala.collection.mutable.ListBuffer
fruits: scala.collection.mutable.ListBuffer[MyClass] = ListBuffer(MyClass@291c57ba)
defined class MyClass
d1: MyClass = MyClass@291c57ba
res0: scala.collection.mutable.ListBuffer[MyClass] = ListBuffer(MyClass@291c57ba)

編輯：
您可能已經重新定義了MyClass，它導致了“類型不匹配”錯誤。 也許是這樣的：

scala> :paste
// Entering paste mode (ctrl-D to finish)

import scala.collection.mutable.ListBuffer
class MyClass(a:String, b:String, c:String)
var fruits = new ListBuffer[MyClass]()

// Exiting paste mode, now interpreting.

import scala.collection.mutable.ListBuffer
defined class MyClass
fruits: scala.collection.mutable.ListBuffer[MyClass] = ListBuffer()

scala> :paste
// Entering paste mode (ctrl-D to finish)

class MyClass(a:String, b:String, c:String)
var d1=new MyClass("data1","data2","data3")
fruits += d1

// Exiting paste mode, now interpreting.

<console>:14: error: type mismatch;
 found   : MyClass(in object $iw)(in object $iw)(in object $iw)(in object $iw)
 required: MyClass(in object $iw)(in object $iw)(in object $iw)(in object $iw)
              fruits += d1
                        ^