续上文，中的\\u00a0是怎么解释出来的

public String utf8ToUnicode(String inStr) {
        char[] myBuffer = inStr.toCharArray();
        
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < inStr.length(); i++) {
         UnicodeBlock ub = UnicodeBlock.of(myBuffer[i]);
            if(ub == UnicodeBlock.BASIC_LATIN){
             //英文及数字等
             sb.append(myBuffer[i]);
            }else if(ub == UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS){
             //全角半角字符
             int j = (int) myBuffer[i] - 65248;
             sb.append((char)j);
            }else{
             //汉字
             short s = (short) myBuffer[i];
                String hexS = Integer.toHexString(s);
                String unicode = "\\u"+hexS;
             sb.append(unicode.toLowerCase());
            }
        }
        return sb.toString();
    }

public static String unicodeToUtf8(String theString) {
          char aChar;
          int len = theString.length();
          StringBuffer outBuffer = new StringBuffer(len);
          for (int x = 0; x < len;) {
              aChar = theString.charAt(x++);
              if (aChar == ‘\\‘) {
                  aChar = theString.charAt(x++);
                  if (aChar == ‘u‘) {
                      // Read the xxxx
                      int value = 0;
                      for (int i = 0; i < 4; i++) {
                          aChar = theString.charAt(x++);
                          switch (aChar) {
                              case ‘0‘:
                              case ‘1‘:
                              case ‘2‘:
                              case ‘3‘:
                              case ‘4‘:
                              case ‘5‘:
                              case ‘6‘:
                              case ‘7‘:
                              case ‘8‘:
                              case ‘9‘:
                                  value = (value << 4) + aChar - ‘0‘;
                              break;
                              case ‘a‘:
                              case ‘b‘:
                              case ‘c‘:
                              case ‘d‘:
                              case ‘e‘:
                              case ‘f‘:
                                  value = (value << 4) + 10 + aChar - ‘a‘;
                              break;
                              case ‘A‘:
                              case ‘B‘:
                              case ‘C‘:
                              case ‘D‘:
                              case ‘E‘:
                              case ‘F‘:
                                  value = (value << 4) + 10 + aChar - ‘A‘;
                              break;
                              default:
                                  throw new IllegalArgumentException("Malformed   \\uxxxx   encoding.");
                          }    
                      }
                      outBuffer.append((char) value);
                  } else {
                      if (aChar == ‘t‘)
                          aChar = ‘\t‘;
                      else if (aChar == ‘r‘)
                          aChar = ‘\r‘;
                      else if (aChar == ‘n‘)
                          aChar = ‘\n‘;
                      else if (aChar == ‘f‘)
                          aChar = ‘\f‘;
                      outBuffer.append(aChar);
                  }
              } else
                  outBuffer.append(aChar);
          }//end for
          return outBuffer.toString();
    }