如何在Java中正确计算字符串的长度？

java.text.BreakIterator

考虑以下代码：

def length(text: String, locale: java.util.Locale = java.util.Locale.ENGLISH) = {  val charIterator = java.text.BreakIterator.getCharacterInstance(locale)  charIterator.setText(text)  var result = 0  while(charIterator.next() != BreakIterator.DONE) result += 1  result}

运行它：

scala> val text = "Thîs lóo̰ks we̐ird!"text: java.lang.String = Thîs lóo̰ks we̐ird!scala> val length = length(text)length: Int = 17scala> val prepoints = text.prePointCount(0, text.length)prepoints: Int = 21

使用代理对：

scala> val parens = "uDBFFuDFFCsurpiu0301se!uDBFFuDFFD"parens: java.lang.String =