public static boolean isEmoji(int codePoint) {
  return CharacterData.of(codePoint).isEmoji(codePoint);
}
public static boolean isEmojiPresentation(int codePoint) {
  return CharacterData.of(codePoint).isEmojiPresentation(codePoint);
}
public static boolean isEmojiModifier(int codePoint) {
  return CharacterData.of(codePoint).isEmojiModifier(codePoint);
}
public static boolean isEmojiModifierBase(int codePoint) {
  return CharacterData.of(codePoint).isEmojiModifierBase(codePoint);
}
public static boolean isEmojiComponent(int codePoint) {
  return CharacterData.of(codePoint).isEmojiComponent(codePoint);
}
public static boolean isExtendedPictographic(int codePoint) {
  return CharacterData.of(codePoint).isExtendedPictographic(codePoint);
}

@Test
void testEmoji() {
  String message = "歡迎來(lái)到 www.didispace.com ??，要不要來(lái)杯 ?? ？";
  if(message.codePoints().anyMatch(Character::isEmoji)) {
    System.out.println("Message包含表情");
  }
}

@Test
void testEmoji2() {
  String welcomeMsg ="歡迎來(lái)到 www.didispace.com ??，要不要來(lái)杯 ?? ？";
  OptionalInt emojiOptional = welcomeMsg.codePoints().filter(Character::isEmoji).findFirst();
  if (emojiOptional.isPresent()) {
    int emojiCodePoint = emojiOptional.getAsInt();
    if (Character.isEmojiModifierBase(emojiCodePoint)) {
      System.out.println("Emoji can be modified");
      if (Character.isEmojiModifier(emojiCodePoint))
        System.out.println("Emoji is modified");
      else
        System.out.println("Emoji has not been modified");
    } else
      System.out.println("Emoji cannot be modified");
  } else
    System.out.println("No emoji present");
}

String welcomeMsg = "歡迎來(lái)到 www.didispace.com ??，要不要來(lái)杯 ?? ？";
Matcher matcher = Pattern.compile("\\p{IsEmoji}").matcher(welcomeMsg);
if(matcher.find()) {
    System.out.println("Message contains an emoji!");
}
matcher = Pattern.compile("\\p{IsEmoji_Modifier_Base}").matcher(welcomeMsg);
if(matcher.find()) {
    System.out.println("Message contains an emoji modifier base!");
}