***的文档是源

Row.scala

  /**
   * Returns the value of column `i` as an int.  This function will throw an exception if the value
   * is at `i` is not an integer, or if it is null.
   */
  def getInt(i: Int): Int =
    row.getInt(i)

适用于你的例子：

Applied to your example:

num = num_en.collect()(0).getInt(0)