Module platform
Package org.jfree.data.xy

Class XYSeries

java.lang.Object
org.jfree.data.general.Series
org.jfree.data.xy.XYSeries
All Implemented Interfaces:
Serializable, Cloneable
public class XYSeries extends Series implements Cloneable, Serializable
Represents a sequence of zero or more data items in the form (x, y). By default, items in the series will be sorted into ascending order by x-value, and duplicate x-values are permitted. Both the sorting and duplicate defaults can be changed in the constructor. Y-values can be null to represent missing values.
See Also:

  • Field Details

    • data

      protected List data
      Storage for the data items in the series.

  • Constructor Details

    • XYSeries

      public XYSeries(Comparable key)
      Creates a new empty series. By default, items added to the series will be sorted into ascending order by x-value, and duplicate x-values will be allowed (these defaults can be modified with another constructor).
      Parameters:
      key - the series key (null not permitted).

    • XYSeries

      public XYSeries(Comparable key, boolean autoSort)
      Constructs a new empty series, with the auto-sort flag set as requested, and duplicate values allowed.
      Parameters:
      key - the series key (null not permitted).
      autoSort - a flag that controls whether or not the items in the series are sorted.

    • XYSeries

      public XYSeries(Comparable key, boolean autoSort, boolean allowDuplicateXValues)
      Constructs a new xy-series that contains no data. You can specify whether or not duplicate x-values are allowed for the series.
      Parameters:
      key - the series key (null not permitted).
      autoSort - a flag that controls whether or not the items in the series are sorted.
      allowDuplicateXValues - a flag that controls whether duplicate x-values are allowed.

  • Method Details

    • getMinX

      public double getMinX()
      Returns the smallest x-value in the series, ignoring any Double.NaN values. This method returns Double.NaN if there is no smallest x-value (for example, when the series is empty).
      Returns:
      The smallest x-value.
      See Also:

    • getMaxX

      public double getMaxX()
      Returns the largest x-value in the series, ignoring any Double.NaN values. This method returns Double.NaN if there is no largest x-value (for example, when the series is empty).
      Returns:
      The largest x-value.
      See Also:

    • getMinY

      public double getMinY()
      Returns the smallest y-value in the series, ignoring any null and Double.NaN values. This method returns Double.NaN if there is no smallest y-value (for example, when the series is empty).
      Returns:
      The smallest y-value.
      See Also:

    • getMaxY

      public double getMaxY()
      Returns the largest y-value in the series, ignoring any Double.NaN values. This method returns Double.NaN if there is no largest y-value (for example, when the series is empty).
      Returns:
      The largest y-value.
      See Also:

    • getAutoSort

      public boolean getAutoSort()
      Returns the flag that controls whether the items in the series are automatically sorted. There is no setter for this flag, it must be defined in the series constructor.
      Returns:
      A boolean.

    • getAllowDuplicateXValues

      public boolean getAllowDuplicateXValues()
      Returns a flag that controls whether duplicate x-values are allowed. This flag can only be set in the constructor.
      Returns:
      A boolean.

    • getItemCount

      public int getItemCount()
      Returns the number of items in the series.
      Specified by:
      getItemCount in class Series
      Returns:
      The item count.
      See Also:

    • getItems

      public List getItems()
      Returns the list of data items for the series (the list contains XYDataItem objects and is unmodifiable).
      Returns:
      The list of data items.

    • getMaximumItemCount

      public int getMaximumItemCount()
      Returns the maximum number of items that will be retained in the series. The default value is Integer.MAX_VALUE.
      Returns:
      The maximum item count.
      See Also:

    • setMaximumItemCount

      public void setMaximumItemCount(int maximum)
      Sets the maximum number of items that will be retained in the series. If you add a new item to the series such that the number of items will exceed the maximum item count, then the first element in the series is automatically removed, ensuring that the maximum item count is not exceeded.

      Typically this value is set before the series is populated with data, but if it is applied later, it may cause some items to be removed from the series (in which case a SeriesChangeEvent will be sent to all registered listeners).

      Parameters:
      maximum - the maximum number of items for the series.

    • add

      public void add(XYDataItem item)
      Adds a data item to the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      item - the (x, y) item (null not permitted).

    • add

      public void add(double x, double y)
      Adds a data item to the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      x - the x value.
      y - the y value.

    • add

      public void add(double x, double y, boolean notify)
      Adds a data item to the series and, if requested, sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      x - the x value.
      y - the y value.
      notify - a flag that controls whether or not a SeriesChangeEvent is sent to all registered listeners.

    • add

      public void add(double x, Number y)
      Adds a data item to the series and sends a SeriesChangeEvent to all registered listeners. The unusual pairing of parameter types is to make it easier to add null y-values.
      Parameters:
      x - the x value.
      y - the y value (null permitted).

    • add

      public void add(double x, Number y, boolean notify)
      Adds a data item to the series and, if requested, sends a SeriesChangeEvent to all registered listeners. The unusual pairing of parameter types is to make it easier to add null y-values.
      Parameters:
      x - the x value.
      y - the y value (null permitted).
      notify - a flag that controls whether or not a SeriesChangeEvent is sent to all registered listeners.

    • add

      public void add(Number x, Number y)
      Adds a new data item to the series (in the correct position if the autoSort flag is set for the series) and sends a SeriesChangeEvent to all registered listeners.

      Throws an exception if the x-value is a duplicate AND the allowDuplicateXValues flag is false.

      Parameters:
      x - the x-value (null not permitted).
      y - the y-value (null permitted).
      Throws:
      SeriesException - if the x-value is a duplicate and the allowDuplicateXValues flag is not set for this series.

    • add

      public void add(Number x, Number y, boolean notify)
      Adds new data to the series and, if requested, sends a SeriesChangeEvent to all registered listeners.

      Throws an exception if the x-value is a duplicate AND the allowDuplicateXValues flag is false.

      Parameters:
      x - the x-value (null not permitted).
      y - the y-value (null permitted).
      notify - a flag the controls whether or not a SeriesChangeEvent is sent to all registered listeners.

    • add

      public void add(XYDataItem item, boolean notify)
      Adds a data item to the series and, if requested, sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      item - the (x, y) item (null not permitted).
      notify - a flag that controls whether or not a SeriesChangeEvent is sent to all registered listeners.

    • delete

      public void delete(int start, int end)
      Deletes a range of items from the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      start - the start index (zero-based).
      end - the end index (zero-based).

    • remove

      public XYDataItem remove(int index)
      Removes the item at the specified index and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      index - the index.
      Returns:
      The item removed.

    • remove

      public XYDataItem remove(Number x)
      Removes an item with the specified x-value and sends a SeriesChangeEvent to all registered listeners. Note that when a series permits multiple items with the same x-value, this method could remove any one of the items with that x-value.
      Parameters:
      x - the x-value.
      Returns:
      The item removed.

    • clear

      public void clear()
      Removes all data items from the series and sends a SeriesChangeEvent to all registered listeners.

    • getDataItem

      public XYDataItem getDataItem(int index)
      Return the data item with the specified index.
      Parameters:
      index - the index.
      Returns:
      The data item with the specified index.

    • getX

      public Number getX(int index)
      Returns the x-value at the specified index.
      Parameters:
      index - the index (zero-based).
      Returns:
      The x-value (never null).

    • getY

      public Number getY(int index)
      Returns the y-value at the specified index.
      Parameters:
      index - the index (zero-based).
      Returns:
      The y-value (possibly null).

    • updateByIndex

      public void updateByIndex(int index, Number y)
      Updates the value of an item in the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      index - the item (zero based index).
      y - the new value (null permitted).

    • update

      public void update(Number x, Number y)
      Updates an item in the series.
      Parameters:
      x - the x-value (null not permitted).
      y - the y-value (null permitted).
      Throws:
      SeriesException - if there is no existing item with the specified x-value.

    • addOrUpdate

      public XYDataItem addOrUpdate(double x, double y)
      Adds or updates an item in the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      x - the x-value.
      y - the y-value.
      Returns:
      The item that was overwritten, if any.

    • addOrUpdate

      public XYDataItem addOrUpdate(Number x, Number y)
      Adds or updates an item in the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      x - the x-value (null not permitted).
      y - the y-value (null permitted).
      Returns:
      A copy of the overwritten data item, or null if no item was overwritten.

    • addOrUpdate

      public XYDataItem addOrUpdate(XYDataItem item)
      Adds or updates an item in the series and sends a SeriesChangeEvent to all registered listeners.
      Parameters:
      item - the data item (null not permitted).
      Returns:
      A copy of the overwritten data item, or null if no item was overwritten.

    • indexOf

      public int indexOf(Number x)
      Returns the index of the item with the specified x-value, or a negative index if the series does not contain an item with that x-value. Be aware that for an unsorted series, the index is found by iterating through all items in the series.
      Parameters:
      x - the x-value (null not permitted).
      Returns:
      The index.

    • toArray

      public double[][] toArray()
      Returns a new array containing the x and y values from this series.
      Returns:
      A new array containing the x and y values from this series.

    • clone

      public Object clone() throws CloneNotSupportedException
      Returns a clone of the series.
      Overrides:
      clone in class Series
      Returns:
      A clone of the series.
      Throws:
      CloneNotSupportedException - if there is a cloning problem.

    • createCopy

      public XYSeries createCopy(int start, int end) throws CloneNotSupportedException
      Creates a new series by copying a subset of the data in this time series.
      Parameters:
      start - the index of the first item to copy.
      end - the index of the last item to copy.
      Returns:
      A series containing a copy of this series from start until end.
      Throws:
      CloneNotSupportedException - if there is a cloning problem.

    • equals

      public boolean equals(Object obj)
      Tests this series for equality with an arbitrary object.
      Overrides:
      equals in class Series
      Parameters:
      obj - the object to test against for equality (null permitted).
      Returns:
      A boolean.

    • hashCode

      public int hashCode()
      Returns a hash code.
      Overrides:
      hashCode in class Series
      Returns:
      A hash code.