/** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(String separator) {
    return new Joiner(separator);
  }

  /** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(char separator) {
    return new Joiner(String.valueOf(separator));
  }

  private final String separator;

   * the operating system's default line separator. This method is equivalent to {@code
   * writeLines(lines, System.getProperty("line.separator"))}.
   *
   * @throws IOException if an I/O error occurs while writing to this sink
   */
  public void writeLines(Iterable<? extends CharSequence> lines) throws IOException {
    writeLines(lines, System.getProperty("line.separator"));
  }

  /**

    String separator = System.getProperty("line.separator");
    assertEquals("foo" + separator + "bar" + separator + "baz" + separator, sink.getString());
  }

  public void testWriteLines_stream() throws IOException {
    sink.writeLines(ImmutableList.of("foo", "bar", "baz").stream());
    String separator = LINE_SEPARATOR.value();

    }

    /**
     * Sets the field separator for text output.
     *
     * @param fieldSeparator the field separator
     */
    public void setFieldSeparator(final String fieldSeparator) {
        this.fieldSeparator = fieldSeparator;
    }

    /**
     * Sets the line separator for text output.
     *
     * @param lineSeparator the line separator
     */

        File file = new File(s);
        if (file.isAbsolute()) {
            // path was already absolute, just normalize file separator and we're done
            s = file.getPath();
        } else if (file.getPath().startsWith(File.separator)) {
            // drive-relative Windows path, don't align with project directory but with drive root
            s = file.getAbsolutePath();
        } else {

    }

    private static String runner(Map<String, String> add) throws Exception {
        String separator = FileSystems.getDefault().getSeparator();
        String classpath = System.getProperty("java.class.path");
        String path =
                System.getProperty("java.home") + separator + "bin" + separator + (Os.IS_WINDOWS ? "java.exe" : "java");
        ProcessBuilder processBuilder =

                "WEB-INF" + File.separator + "lib" + File.separator);
        // WEB-INF/env/crawler/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/env/" + getExecuteType() + "/lib")),
                "WEB-INF" + File.separator + "env" + File.separator + getExecuteType() + File.separator + "lib" + File.separator);
        // WEB-INF/plugin

  OS_ARCH("os.arch"),

  /** Operating system version. */
  OS_VERSION("os.version"),

  /** File separator ("/" on UNIX). */
  FILE_SEPARATOR("file.separator"),

  /** Path separator (":" on UNIX). */
  PATH_SEPARATOR("path.separator"),

  /** Line separator ("\n" on UNIX). */
  LINE_SEPARATOR("line.separator"),

  /** User's account name. */
  USER_NAME("user.name"),

  /** User's home directory. */

            value = StringUtil.replace(value, groupingSeparator, "");
        }
        return value;
    }

    /**
     * Finds the separator for grouping.
     *
     * @param locale
     *            Locale
     * @return Separator for grouping
     */
    public static String findGroupingSeparator(final Locale locale) {
        final DecimalFormatSymbols symbol = getDecimalFormatSymbols(locale);

    }

    /**
     * Sets the field separator for key-value pairs.
     *
     * @param fieldSeparator the field separator
     */
    public void setFieldSeparator(final String fieldSeparator) {
        this.fieldSeparator = fieldSeparator;
    }

    /**
     * Sets the line separator between fields.
     *
     * @param lineSeparator the line separator
     */