Convert \\ to \ in Scala - scala

Question

Let's say that I have a string: "\\u2026". And, I want it to change that to "\u2026" to print out the unicode in Scala. Is there a way to do that? Thank you for your time.
Edit:
Let me clarify. Due to some circumstances, I have a string like: "Following char is in unicode: \\u2026", which prints:
Following char is in unicode: \u2026
But, I want to edit it so that it prints:
Following char is in unicode: …
Thank you for the answers. This is what I ended up doing.
def FixString(string: String) : String = {
var newString = string;
// Find the 1st problematic string
var start = string.indexOf("\\u");
while(start != -1) {
// Extract the problematic string
val end = start + 6;
val wrongString = string.substring(start,end);
// Convert to unicode
val hexCode = wrongString.substring(2);
val intCode = Integer.parseInt(hexCode, 16);
val finalString = new String(Character.toChars(intCode));
// Replace
newString = string.replace(wrongString,finalString);
// Find next problematic string
start = string.indexOf("\\u", end);
}
return newString;
}

Answer 1

If you know the string is exactly \uXXXX (unescaped), then
val stringWithBackslash = "\\u2026" // just for example
val hexCode = stringWithBackslash.substring(2) // "2026"
val intCode = Integer.parseInt(hexCode, 16) // 8230
val finalString = new String(Character.toChars(intCode)) // "…"
(code adapted from Creating Unicode character from its number). If not, pick the part you want with regular expression """\\u(\d{4})""".

Answer 2

Short answer to the question as asked to use the String.replace method:
"\\u2026".replace("\\\\", "\\")
Notice that I had to double each backslash because the backslash character also begins Java String escape sequences.
If you want the JVM to perform UTF-8 IO (not required for this question), set the Java system property file.encoding=UTF-8, like this:
$ sbt console
Welcome to Scala 2.12.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_151).
Type in expressions for evaluation. Or try :help.
scala> System.setProperty("file.encoding","UTF-8")
res0: String = UTF-8
scala> val strWithError: String = "\\u2026"
strWithError: String = \u2026
scala> val prefixedString: String = strWithError.replace("\\\\", "\\") // corrected string as per OP
prefixedString: String = \u2026
Here is bonus information, adapted from https://stackoverflow.com/a/16034658/553865 (referenced by Alexey Romanov's answer):
scala> val utfString: String = strWithError.replace("\\u", "") // utf code point
utfString: String = 2026
scala> val intCode = Integer.parseInt(utfString, 16)
intCode: Int = 8230
scala> val symbol = new String(Character.toChars(intCode))
symbol: String = …