code: private static String escapeJSON(String text) {
          StringBuilder builder = new StringBuilder();
  
          builder.append('"');
          for (int index = 0; index < text.length(); index++) {
              char chr = text.charAt(index);
  
              switch (chr) {
                  case '"':
                  case '\\':
                      builder.append('\\');
                      builder.append(chr);
                      break;
                  case '\b':
                      builder.append("\\b");
                      break;
                  case '\t':
                      builder.append("\\t");
                      break;
                  case '\n':
                      builder.append("\\n");
                      break;
                  case '\r':
                      builder.append("\\r");
                      break;
                  default:
                      if (chr < ' ') {
                          String t = "000" + Integer.toHexString(chr);
                          builder.append("\\u" + t.substring(t.length() - 4));
                      } else {
                          builder.append(chr);
                      }
                      break;
              }
          }
          builder.append('"');
  
          return builder.toString();
      }
docs: Escape a string to create a valid JSON string
  
  @param text
  @return