DoubleArray (The Adobe AEM Quickstart and Web Application.)

All Known Implementing Classes:

ResizableDoubleArray
```
public interface DoubleArray
```
Provides a standard interface for double arrays. Allows different array implementations to support various storage mechanisms such as automatic expansion, contraction, and array "rolling".

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`addElement(double value)` Adds an element to the end of this expandable array
`double`	`addElementRolling(double value)` Adds an element to the end of the array and removes the first element in the array.
`void`	`clear()` Clear the double array
`double`	`getElement(int index)` Returns the element at the specified index.
`double[]`	`getElements()` Returns a double[] array containing the elements of this `DoubleArray`.
`int`	`getNumElements()` Returns the number of elements currently in the array.
`void`	`setElement(int index, double value)` Sets the element at the specified index.

- Method Detail
  - getNumElements
```
int getNumElements()
```
    Returns the number of elements currently in the array. Please note that this may be different from the length of the internal storage array.
    
    Returns:
    
    number of elements
  - getElement
```
double getElement(int index)
```
    Returns the element at the specified index. Note that if an out of bounds index is supplied a ArrayIndexOutOfBoundsException will be thrown.
    
    Parameters:
    
    index - index to fetch a value from
    
    Returns:
    
    value stored at the specified index
    
    Throws:
    
    java.lang.ArrayIndexOutOfBoundsException - if index is less than zero or is greater than getNumElements() - 1.
  - setElement
```
void setElement(int index,
                double value)
```
    Sets the element at the specified index. If the specified index is greater than getNumElements() - 1, the numElements property is increased to index +1 and additional storage is allocated (if necessary) for the new element and all (uninitialized) elements between the new element and the previous end of the array).
    
    Parameters:
    
    index - index to store a value in
    
    value - value to store at the specified index
    
    Throws:
    
    java.lang.ArrayIndexOutOfBoundsException - if index is less than zero.
  - addElement
```
void addElement(double value)
```
    Adds an element to the end of this expandable array
    
    Parameters:
    
    value - to be added to end of array
  - addElementRolling
```
double addElementRolling(double value)
```
    Adds an element to the end of the array and removes the first element in the array. Returns the discarded first element. The effect is similar to a push operation in a FIFO queue.
    
    Example: If the array contains the elements 1, 2, 3, 4 (in that order) and addElementRolling(5) is invoked, the result is an array containing the entries 2, 3, 4, 5 and the value returned is 1.
    
    Parameters:
    
    value - the value to be added to the array
    
    Returns:
    
    the value which has been discarded or "pushed" out of the array by this rolling insert
  - getElements
```
double[] getElements()
```
    Returns a double[] array containing the elements of this DoubleArray. If the underlying implementation is array-based, this method should always return a copy, rather than a reference to the underlying array so that changes made to the returned array have no effect on the DoubleArray.
    
    Returns:
    
    all elements added to the array
  - clear
```
void clear()
```
    Clear the double array

Interface DoubleArray

Method Summary

Method Detail

getNumElements

getElement

setElement

addElement

addElementRolling

getElements

clear