weiss.util
Class ArrayList

java.lang.Object
  |
  +--weiss.util.AbstractCollection
        |
        +--weiss.util.ArrayList

All Implemented Interfaces:

Collection, List, java.io.Serializable

public class ArrayList

extends AbstractCollection

implements List

The ArrayList implements a growable array. Insertions are always done at the end.

See Also:

Serialized Form

Constructor Summary

ArrayList()
Construct an empty ArrayList.

ArrayList(Collection other)
Construct an ArrayList with same items as another Collection.

Method Summary

boolean	add(java.lang.Object x) Adds an item to this collection, at the end.
void	clear() Change the size of this collection to zero.
boolean	contains(java.lang.Object x) Tests if some item is in this collection.
java.lang.Object	get(int idx) Returns the item at position idx.
Iterator	iterator() Obtains an Iterator object used to traverse the collection.
ListIterator	listIterator(int idx) Obtains a ListIterator object used to traverse the collection bidirectionally.
java.lang.Object	remove(int idx) Removes an item from this collection.
boolean	remove(java.lang.Object x) Removes an item from this collection.
java.lang.Object	set(int idx, java.lang.Object newVal) Changes the item at position idx.
int	size() Returns the number of items in this collection.

Methods inherited from class weiss.util.AbstractCollection

equals, hashCode, isEmpty, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface weiss.util.Collection

isEmpty, toArray

Constructor Detail

ArrayList

public ArrayList()

Construct an empty ArrayList.

ArrayList

public ArrayList(Collection other)

Construct an ArrayList with same items as another Collection.

Method Detail

size

public int size()

Returns the number of items in this collection.

Specified by:

size in interface Collection

Returns:

the number of items in this collection.

get

public java.lang.Object get(int idx)

Returns the item at position idx.

Specified by:

get in interface List

Parameters:

idx - the index to search in.

Throws:

ArrayIndexOutOfBoundsException - if index is out of range.

set

public java.lang.Object set(int idx,
                            java.lang.Object newVal)

Changes the item at position idx.

Specified by:

set in interface List

Parameters:

idx - the index to change.

newVal - the new value.

Returns:

the old value.

Throws:

ArrayIndexOutOfBoundsException - if index is out of range.

contains

public boolean contains(java.lang.Object x)

Tests if some item is in this collection.

Specified by:

contains in interface Collection

Overrides:

contains in class AbstractCollection

Parameters:

x - any object.

Returns:

true if this collection contains an item equal to x.

add

public boolean add(java.lang.Object x)

Adds an item to this collection, at the end.

Specified by:

add in interface Collection

Parameters:

x - any object.

Returns:

true.

remove

public boolean remove(java.lang.Object x)

Removes an item from this collection.

Specified by:

remove in interface Collection

Overrides:

remove in class AbstractCollection

Parameters:

x - any object.

Returns:

true if this item was removed from the collection.

remove

public java.lang.Object remove(int idx)

Removes an item from this collection.

Parameters:

idx - the index of the object.

Returns:

the item was removed from the collection.

clear

public void clear()

Change the size of this collection to zero.

Specified by:

clear in interface Collection

Overrides:

clear in class AbstractCollection

iterator

public Iterator iterator()

Obtains an Iterator object used to traverse the collection.

Specified by:

iterator in interface Collection

listIterator

public ListIterator listIterator(int idx)

Obtains a ListIterator object used to traverse the collection bidirectionally.

Specified by:

listIterator in interface List

Parameters:

idx - the index to start the iterator. Use size() to do complete reverse traversal. Use 0 to do complete forward traversal.

Throws:

IndexOutOfBoundsException - if idx is not between 0 and size(), inclusive.