Method advance

output/java_guava/1.4.16/MultiReader.java:47–52

Closes the current reader and opens the next one, if any.

()

   */

  private void advance() throws IOException {
    close();
    if (it.hasNext()) {
      current = it.next().openStream();
    }
  }

  @Override
  public int read(@Nullable char cbuf[], int off, int len) throws IOException {