java - Scala 代码的 join 函数中的 StringUtils 错误

Question

这是我尝试连接字符串数组的 Scala 代码:

var data:Array[String] = getMyArray(input)
val out = StringUtils.join(data, ",")

然后我得到了以下我无法弄清楚的错误。

overloaded method value join with alternatives: (x$1: java.util.Collection[_],x$2: String)String <and> (x$1: java.util.Collection[_],x$2: Char)String <and> (x$1: java.util.Iterator[_],x$2: String)String <and> (x$1: java.util.Iterator[_],x$2: Char)String <and> (x$1: Array[Object],x$2: String)String <and> (x$1: Array[Object],x$2: Char)String cannot be applied to (Array[String], String) 

Answer 1

为什么不使用 mkString？

    scala> var data:Array[String]=Array("1","2")
    data: Array[String] = Array(1, 2)

    scala> data.mkString(",")
    res2: String = 1,2