DefaultKeyedValueDataset
org.jfree.data.general

Class DefaultKeyedValueDataset

    • Constructor Detail

      • DefaultKeyedValueDataset

        public DefaultKeyedValueDataset()
        Constructs a new dataset, initially empty.
      • DefaultKeyedValueDataset

        public DefaultKeyedValueDataset(Comparable key,                        Number value)
        Creates a new dataset with the specified initial value.
        Parameters:
        key - the key.
        value - the value (null permitted).
      • DefaultKeyedValueDataset

        public DefaultKeyedValueDataset(KeyedValue data)
        Creates a new dataset that uses the data from a KeyedValue instance.
        Parameters:
        data - the data (null permitted).
    • Method Detail

      • getKey

        public Comparable getKey()
        Returns the key associated with the value, or null if the dataset has no data item.
        Specified by:
        getKey in interface KeyedValue
        Returns:
        The key.
      • getValue

        public Number getValue()
        Returns the value.
        Specified by:
        getValue in interface Value
        Returns:
        The value (possibly null).
      • updateValue

        public void updateValue(Number value)
        Updates the value.
        Parameters:
        value - the new value (null permitted).
      • setValue

        public void setValue(Comparable key,            Number value)
        Sets the value for the dataset and sends a DatasetChangeEvent to all registered listeners.
        Parameters:
        key - the key.
        value - the value (null permitted).
      • equals

        public boolean equals(Object obj)
        Tests this dataset for equality with an arbitrary object.
        Overrides:
        equals in class Object
        Parameters:
        obj - the object (null permitted).
        Returns:
        A boolean.
      • hashCode

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

SCaVis 1.8 © jWork.org