How can I combine *u” and the UTF-8 code for console output? (Java)

I would like to combine a "u" with a String that contains a Hex-Code so that I can print out a unicode character in the console.

I’ve tried something like this, but the console only prints regular text, eg uf600:

ArrayList<String> arr = new ArrayList<String>();
emoji.codePoints()
    .mapToObj(Integer::toHexString)
    .forEach((n) -> arr.add(n));  // arr will contain hex strings

for (int i = 1; i < arr.size(); i += 2) {
     System.out.println("\u" + arr.get(i));
}

Answer

In Java, u exists only in the compiler, as a convenience to help you add unicode character literals in your source code. If at run time you create a string that contains u followed by hex digits, there is no mechanism in place to transform it into a single char.

It sounds like you want to transform each code point separately to a string. Here is one way you can do that: use Character.toChars to transform the code point to a char array, and then build a new string from the char array:

ArrayList<String> arr = new ArrayList<String>();
emoji.codePoints().mapToObj(Character::toChars).map(String::new)
    .forEach(arr::add)