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## U

UnitType - Class in org.jfree.util
  Used to indicate absolute or relative units.
UnknownKeyException - Exception in org.jfree.data
  An exception that indicates an unknown key value.
UnknownKeyException(String) - Constructor for exception org.jfree.data.UnknownKeyException
  Creates a new exception.
UP - Static variable in class org.jfree.ui.BevelArrowIcon
  Constant indicating that the arrow is pointing up.
UP - Static variable in class org.jfree.ui.SortButtonRenderer
  Useful constant indicating DESCENDING (that is, arrow pointing up) sorting in the table.
update(int, Number) - Method in class org.jfree.data.xy.XYSeries
  Deprecated.
  Renamed `XYSeries.updateByIndex(int, Number)` to avoid confusion with the `XYSeries.update(Number, Number)` method.
update(Number, Number) - Method in class org.jfree.data.xy.XYSeries
  Updates an item in the series.
updateByIndex(int, Number) - Method in class org.jfree.data.xy.XYSeries
  Updates the value of an item in the series and sends a `SeriesChangeEvent` to all registered listeners.
updateChart(JFreeChart) - Method in interface org.jfree.chart.editor.ChartEditor
  Applies the changes to the specified chart.
updateChart(JFreeChart) - Method in class org.jfree.chart.editor.DefaultChartEditor
  Updates the properties of a chart to match the properties defined on the panel.
updateCrosshairPoint(double, double, double, double, PlotOrientation) - Method in class org.jfree.chart.plot.CrosshairState
  Deprecated.
  Use `CrosshairState.updateCrosshairPoint(double, double, int, int, double, double, PlotOrientation)`. See bug report 1086307.
updateCrosshairPoint(double, double, int, int, double, double, PlotOrientation) - Method in class org.jfree.chart.plot.CrosshairState
  Evaluates a data point and if it is the closest to the anchor point it becomes the new crosshair point.
updateCrosshairValues(CrosshairState, double, double, int, int, double, double, PlotOrientation) - Method in class org.jfree.chart.renderer.xy.AbstractXYItemRenderer
  Considers the current (x, y) coordinate and updates the crosshair point if it meets the criteria (usually means the (x, y) coordinate is the closest to the anchor point so far).
updateCrosshairValues(CrosshairState, double, double, double, double, PlotOrientation) - Method in class org.jfree.chart.renderer.xy.AbstractXYItemRenderer
  Deprecated.
  Use `AbstractXYItemRenderer.updateCrosshairValues(CrosshairState, double, double, int, int, double, double, PlotOrientation)` -- see bug report 1086307.
updateCrosshairX(double) - Method in class org.jfree.chart.plot.CrosshairState
  Deprecated.
  Use `CrosshairState.updateCrosshairX(double, int)`. See bug report 1086307.
updateCrosshairX(double, int) - Method in class org.jfree.chart.plot.CrosshairState
  Evaluates an x-value and if it is the closest to the anchor x-value it becomes the new crosshair value.
updateCrosshairY(double) - Method in class org.jfree.chart.plot.CrosshairState
  Deprecated.
  Use `CrosshairState.updateCrosshairY(double, int)`. See bug report 1086307.
updateCrosshairY(double, int) - Method in class org.jfree.chart.plot.CrosshairState
  Evaluates a y-value and if it is the closest to the anchor y-value it becomes the new crosshair value.
updatePlotProperties(Plot) - Method in class org.jfree.chart.editor.DefaultPlotEditor
  Updates the plot properties to match the properties defined on the panel.
updateUI() - Method in class org.jfree.chart.ChartPanel
  Updates the UI for a LookAndFeel change.
URLTagFragmentGenerator - Interface in org.jfree.chart.imagemap
  Interface for generating the URL fragment of an HTML image map area tag.

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