Interface Object2DoubleFunction<K>

    • Method Detail

      • applyAsDouble

        default double applyAsDouble​(K operand)
        Specified by:
        applyAsDouble in interface java.util.function.ToDoubleFunction<K>
        Since:
        8.0.0
      • put

        default double put​(K key,
                           double value)
        Adds a pair to the map (optional operation).
        Parameters:
        key - the key.
        value - the value.
        Returns:
        the old value, or the default return value if no value was present for the given key.
        See Also:
        Function.put(Object,Object)
      • getDouble

        double getDouble​(java.lang.Object key)
        Returns the value to which the given key is mapped.
        Parameters:
        key - the key.
        Returns:
        the corresponding value, or the default return value if no value was present for the given key.
        See Also:
        Function.get(Object)
      • getOrDefault

        default double getOrDefault​(java.lang.Object key,
                                    double defaultValue)
        Returns the value associated by this function to the specified key, or give the specified value if not present.
        Parameters:
        key - the key.
        defaultValue - the value to return if not present.
        Returns:
        the corresponding value, or defaultValue if no value was present for the given key.
        Since:
        8.5.0
        See Also:
        Function.getOrDefault(Object, Object)
      • removeDouble

        default double removeDouble​(java.lang.Object key)
        Removes the mapping with the given key (optional operation).
        Parameters:
        key - the key.
        Returns:
        the old value, or the default return value if no value was present for the given key.
        See Also:
        Function.remove(Object)
      • put

        @Deprecated
        default java.lang.Double put​(K key,
                                     java.lang.Double value)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Associates the specified value with the specified key in this function (optional operation).
        Specified by:
        put in interface Function<K,​java.lang.Double>
        Parameters:
        key - the key.
        value - the value.
        Returns:
        the old value, or null if no value was present for the given key.
        See Also:
        Map.put(Object,Object)
      • get

        @Deprecated
        default java.lang.Double get​(java.lang.Object key)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Returns the value associated by this function to the specified key.
        Specified by:
        get in interface Function<K,​java.lang.Double>
        Parameters:
        key - the key.
        Returns:
        the corresponding value, or null if no value was present for the given key.
        See Also:
        Map.get(Object)
      • getOrDefault

        @Deprecated
        default java.lang.Double getOrDefault​(java.lang.Object key,
                                              java.lang.Double defaultValue)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Returns the value associated by this function to the specified key, or give the specified value if not present.
        Specified by:
        getOrDefault in interface Function<K,​java.lang.Double>
        Parameters:
        key - the key.
        defaultValue - the default value to return if not present.
        Returns:
        the corresponding value, or defaultValue if no value was present for the given key.
        See Also:
        Map.getOrDefault(Object, Object)
      • remove

        @Deprecated
        default java.lang.Double remove​(java.lang.Object key)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Removes this key and the associated value from this function if it is present (optional operation).
        Specified by:
        remove in interface Function<K,​java.lang.Double>
        Parameters:
        key - the key.
        Returns:
        the old value, or null if no value was present for the given key.
        See Also:
        Map.remove(Object)
      • defaultReturnValue

        default void defaultReturnValue​(double rv)
        Sets the default return value (optional operation). This value must be returned by type-specific versions of get(), put() and remove() to denote that the map does not contain the specified key. It must be 0/false/null by default.
        Parameters:
        rv - the new default return value.
        See Also:
        defaultReturnValue()
      • defaultReturnValue

        default double defaultReturnValue()
        Gets the default return value.

        This default implementation just return the default null value of the type (null for objects, 0 for scalars, false for Booleans).

        Returns:
        the current default return value.
      • andThen

        @Deprecated
        default <T> java.util.function.Function<K,​T> andThen​(java.util.function.Function<? super java.lang.Double,​? extends T> after)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Specified by:
        andThen in interface java.util.function.Function<K,​java.lang.Double>