java如何在数据通信是分离字符串和表情？

public static String filterEmoji(String source) { 
         if(source != null)
         {
             Pattern emoji = Pattern.compile ("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]",Pattern.UNICODE_CASE | Pattern . CASE_INSENSITIVE ) ;
             Matcher emojiMatcher = emoji.matcher(source);
             if ( emojiMatcher.find())
             {
                 source = emojiMatcher.replaceAll("*");
                 return source ;
             }
         return source;
        }
        return source; 
     }