Class ArrayListOfData

java.lang.Object

ArrayListOfData

public class ArrayListOfData
extends java.lang.Object

This class creates and maintains an Array List of Data Objects. An Array List uses a Java array as its basic data structure. Because it is a "List", the order of the Data objects must be preserved. In other words, the iterator must return the objects in the same order that the objects were inserted into this list. Also, not that it should be possible for the user to insert 'null' values into a ArrayListOfData.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ARRAY_INCREMENT This constant specifies how much bigger the array should be made, when the array is full and has to be made larger.
static int	INITIAL_ARRAY_SIZE This constant specifies how big the initial (empty) array should be made in the constructor

Constructor Summary

Constructors

Constructor and Description
ArrayListOfData() This constructor creates an empty ArrayListOfData.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(Data datum) This function adds the Data object to this ArrayListOfData.
int	getArraySize() This function returns the size of the array (so if the array is defined as private Data[] data; then this function returns data.length).
int	getDataObjectCount() This function returns the number of Data objects that are currently in this ArrayList.
Iterator	getIterator() This function returns an Iterator that can be used to access the Data elements from this ArrayListOfData.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INITIAL_ARRAY_SIZE

public static final int INITIAL_ARRAY_SIZE

This constant specifies how big the initial (empty) array should be made in the constructor

See Also:

Constant Field Values

ARRAY_INCREMENT

public static final int ARRAY_INCREMENT

This constant specifies how much bigger the array should be made, when the array is full and has to be made larger.

See Also:

Constant Field Values

Constructor Detail

ArrayListOfData

public ArrayListOfData()

This constructor creates an empty ArrayListOfData.

Method Detail

getDataObjectCount

public int getDataObjectCount()

This function returns the number of Data objects that are currently in this ArrayList.

Returns:

The number of Data elements in this ArrayListOfData.

getArraySize

public int getArraySize()

This function returns the size of the array (so if the array is defined as private Data[] data; then this function returns data.length).

Returns:

The actual size of the array.

add

public void add(Data datum)

This function adds the Data object to this ArrayListOfData. The data array is resized larger if necessary. New Data objects are added to the first empty spot (i.e., the end of the list).

Parameters:

datum - Is the new Data object to be added.

getIterator

public Iterator getIterator()

This function returns an Iterator that can be used to access the Data elements from this ArrayListOfData.

Returns:

An Iterator over the elements of this ArrayListOfData.