How can I display a character above U+FFFF?

How can I display a character above U+FFFF? Say I want to show U+1F384. "\u1F384" is interpreted as "\u1F38" followed by the character "4", and gives the error No glyph found for the ? (\u1F38) character. "\uD83C\uDF84" is interpreted as the character "\uD83C" followed by the character "\uDF84", and gives the error

No glyph found for the ? (\uD83C) character
No glyph found for the ? (\uDF84) character

Here is some example code to demonstrate:

PFont font;

void setup()
{
  size(128, 128);
  background(0);
  font = loadFont("Symbola-8.vlw");
  textFont(font, 8);

  fill(255);
  text("\u1F384", 10, 10);

}

void draw()
{

}

As stated by the tag, this is in the language Processing. \U0001F384 gives the error unexpected char: 'U', presumably because processing doesn't support UTF-32 in that format.

It doesn't really matter how it is displayed, the main problem is making a string contain a character whose decimal codepoint is greater than 65,535.

The following code works as expected on my operating system (macos):

import java.lang.Character.*;

void setup() {
  size(300, 300);
  background(209);
  textFont(createFont("Wingdings", 96));
  int value = 0x1F384;
  String s = Character.toString(value);
  text(s,100,120);
}