How to use

getStartY

method

in

org.jfree.data.xy.AbstractIntervalXYDataset

/**
 * Returns the start y-value (as a double primitive) for an item within a
 * series.
 *
 * @param series  the series index (zero-based).
 * @param item  the item index (zero-based).
 *
 * @return The value.
 */
@Override
public double getStartYValue(int series, int item) {
  double result = Double.NaN;
  Number y = getStartY(series, item);
  if (y != null) {
    result = y.doubleValue();
  }
  return result;
}

/**
 * Returns the start y-value (as a double primitive) for an item within a
 * series.
 *
 * @param series  the series index (zero-based).
 * @param item  the item index (zero-based).
 *
 * @return The value.
 */
public double getStartYValue(int series, int item) {
  double result = Double.NaN;
  Number y = getStartY(series, item);
  if (y != null) {
    result = y.doubleValue();
  }
  return result;
}