char to Unicode more than U+FFFF in java?

Question

How can I display a Unicode Character above U+FFFF using char in Java?

I need something like this (if it were valid):

char u = '\u+10FFFF';

Answer 1

You can't do it with a single char (which holds a UTF-16 code unit), but you can use a String:

// This represents U+10FFFF
String x = "\udbff\udfff";

Alternatively:

String y = new StringBuilder().appendCodePoint(0x10ffff).toString();

That is a surrogate pair (two UTF-16 code units which combine to form a single Unicode code point beyond the Basic Multilingual Plane). Of course, you need whatever's going to display your data to cope with it too...