weiss.util
Class AbstractCollection<AnyType>

java.lang.Object
  weiss.util.AbstractCollection<AnyType>

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<AnyType>, Collection<AnyType>

Direct Known Subclasses:

ArrayList, HashSet, LinkedList, PriorityQueue, TreeSet

public abstract class AbstractCollection<AnyType>
extends java.lang.Object
implements Collection<AnyType>

AbstractCollection provides default implementations for some of the easy methods in the Collection interface.

See Also:

Serialized Form

Constructor Summary

AbstractCollection()

Method Summary

boolean	add(AnyType x) Adds x to this collections.
void	clear() Change the size of this collection to zero.
boolean	contains(java.lang.Object x) Returns true if this collection contains x.
boolean	equals(java.lang.Object other) Return true if items in other collection are equal to items in this collection (same order, and same according to equals).
int	hashCode() Return the hashCode.
boolean	isEmpty() Tests if this collection is empty.
boolean	remove(java.lang.Object x) Removes non-null x from this collection.
java.lang.Object[]	toArray() Obtains a primitive array view of the collection.
<OtherType> OtherType[]	toArray(OtherType[] arr) Obtains a primitive array view of the collection.
java.lang.String	toString() Return a string representation of this collection.

Methods inherited from class java.lang.Object

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

Methods inherited from interface weiss.util.Collection

iterator, size

Constructor Detail

AbstractCollection

public AbstractCollection()

Method Detail

isEmpty

public boolean isEmpty()

Tests if this collection is empty.

Specified by:

isEmpty in interface Collection<AnyType>

Returns:

true if the size of this collection is zero.

clear

public void clear()

Change the size of this collection to zero.

Specified by:

clear in interface Collection<AnyType>

toArray

public java.lang.Object[] toArray()

Obtains a primitive array view of the collection.

Specified by:

toArray in interface Collection<AnyType>

Returns:

the primitive array view.

toArray

public <OtherType> OtherType[] toArray(OtherType[] arr)

Description copied from interface: Collection

Obtains a primitive array view of the collection.

Specified by:

toArray in interface Collection<AnyType>

Returns:

the primitive array view.

contains

public boolean contains(java.lang.Object x)

Returns true if this collection contains x. If x is null, returns false. (This behavior may not always be appropriate.)

Specified by:

contains in interface Collection<AnyType>

Parameters:

x - the item to search for.

Returns:

true if x is not null and is found in this collection.

add

public boolean add(AnyType x)

Adds x to this collections. This default implementation always throws an exception.

Specified by:

add in interface Collection<AnyType>

Parameters:

x - the item to add.

Returns:

true if this item was added to the collection.

Throws:

java.lang.UnsupportedOperationException - always.

remove

public boolean remove(java.lang.Object x)

Removes non-null x from this collection. (This behavior may not always be appropriate.)

Specified by:

remove in interface Collection<AnyType>

Parameters:

x - the item to remove.

Returns:

true if remove succeeds.

equals

public final boolean equals(java.lang.Object other)

Return true if items in other collection are equal to items in this collection (same order, and same according to equals).

Overrides:

equals in class java.lang.Object

hashCode

public final int hashCode()

Return the hashCode.

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Return a string representation of this collection.

Overrides:

toString in class java.lang.Object