以编程方式创建Unicode？(Programmatically Create Unicode?)

 给定一个十六进制String ，我如何以编程方式创建一个Unicode String ？ 
 
 例： 
 
 def f(x: String): String = s"\u$s" 
 
 无法编译： 
 
scala> def f(x: String): String = s"\u$s"
<console>:1: error: error in unicode escape
       def f(x: String): String = s"\u$s"
                                      ^
 
 我尝试了以下，但失败了： 
 
scala> def f(x: String): String = "\\u" + x
f: (x: String)String

scala> f("0021")
res19: String = \u0021

scala> "\u0021"
res20: String = !

scala> res19 == res20
res21: Boolean = false

Given a hex String, how can I programmatically create a Unicode String?
 
Example:
 
def f(x: String): String = s"\u$s"
 
fails to compile:
 
scala> def f(x: String): String = s"\u$s"
<console>:1: error: error in unicode escape
       def f(x: String): String = s"\u$s"
                                      ^
 
I tried the following, but it failed:
 
scala> def f(x: String): String = "\\u" + x
f: (x: String)String

scala> f("0021")
res19: String = \u0021

scala> "\u0021"
res20: String = !

scala> res19 == res20
res21: Boolean = false

原文：https://stackoverflow.com/questions/40601538