How to use

getSeries

method

in

org.jfree.data.xy.VectorSeriesCollection

/**
 * Returns the number of items in the specified series.
 *
 * @param series  the series (zero-based index).
 *
 * @return The item count.
 *
 * @throws IllegalArgumentException if {@code series} is not in the
 *     range {@code 0} to {@code getSeriesCount() - 1}.
 */
@Override
public int getItemCount(int series) {
  // defer argument checking
  return getSeries(series).getItemCount();
}

VectorSeries ser = dataset.getSeries(seriesnum);

/**
 * Returns the key for a series.
 *
 * @param series  the series index (in the range {@code 0} to
 *     {@code getSeriesCount() - 1}).
 *
 * @return The key for a series.
 *
 * @throws IllegalArgumentException if {@code series} is not in the
 *     specified range.
 */
@Override
public Comparable getSeriesKey(int series) {
  // defer argument checking
  return getSeries(series).getKey();
}

/**
 * Returns the key for a series.
 *
 * @param series  the series index (in the range <code>0</code> to
 *     <code>getSeriesCount() - 1</code>).
 *
 * @return The key for a series.
 *
 * @throws IllegalArgumentException if <code>series</code> is not in the
 *     specified range.
 */
public Comparable getSeriesKey(int series) {
  // defer argument checking
  return getSeries(series).getKey();
}

/**
 * Returns the number of items in the specified series.
 *
 * @param series  the series (zero-based index).
 *
 * @return The item count.
 *
 * @throws IllegalArgumentException if <code>series</code> is not in the
 *     range <code>0</code> to <code>getSeriesCount() - 1</code>.
 */
public int getItemCount(int series) {
  // defer argument checking
  return getSeries(series).getItemCount();
}