Vector class « Vector « List « Collections

Constructor Summary

Vector()	Creates an empty vector so that its internal data array has size 10 and its standard capacity increment is zero.
Vector(Collection<? extends E> c)	Creates a vector containing the elements of the specified collection, in the order they are returned by the collection's iterator.
Vector(int initialCapacity)	Creates an empty vector with the specified initial capacity and with its capacity increment equal to zero.
Vector(int initialCapacity, int capacityIncrement)	Creates an empty vector with the specified initial capacity and capacity increment.

Add elements to this vector

Return	Method	Summary
boolean	add(E e)	Appends the specified element to the end of this Vector.
void	add(int index, E element)	Inserts the specified element at the specified position in this Vector.
boolean	addAll(Collection<? extends E> c)	Appends all of the elements in the specified Collection to the end of this Vector, in the order that they are returned by the specified Collection's Iterator.
boolean	addAll(int index, Collection<? extends E> c)	Inserts all of the elements in the specified Collection into this Vector at the specified position.
void	addElement(E obj)	Adds the specified component to the end of this vector, increasing its size by one.
void	insertElementAt(E obj, int index)	Inserts the specified object as a component in this vector at the specified index.

Size and capacity

Return	Method	Summary
int	capacity()	Returns the current capacity of this vector.
void	ensureCapacity(int minCapacity)	Increases the capacity of this vector, if necessary, to ensure that it can hold at least the number of components specified by the minimum capacity argument.
void	setSize(int newSize)	Sets the size of this vector.
int	size()	Returns the number of components in this vector.
void	trimToSize()	Trims the capacity of this vector to be the vector's current size.

Remove all elements from a vector

Return	Method	Summary
void	clear()	Removes all of the elements from this Vector.

Clone a vector

Return	Method	Summary
Object	clone()	Returns a clone of this vector.

Does it contain a certain element

Return	Method	Summary
boolean	contains(Object o)	Returns true if this vector contains the specified element.
boolean	containsAll(Collection<?> c)	Returns true if this Vector contains all of the elements in the specified Collection.

Copy elements in vector to an array

Return	Method	Summary
void	copyInto(Object[] anArray)	Copies the components of this vector into the specified array.

Get Enumeration from this vector

Return	Method	Summary
Enumeration<E>	elements()	Returns an enumeration of the components of this vector.

Compare two vectors

Return	Method	Summary
boolean	equals(Object o)	Compares the specified Object with this Vector for equality.

Get element from vector

Return	Method	Summary
E	elementAt(int index)	Returns the component at the specified index.
E	firstElement()	Returns the first component (the item at index 0) of this vector.
E	get(int index)	Returns the element at the specified position in this Vector.
E	lastElement()	Returns the last component of the vector.

Is vector empty

Return	Method	Summary
boolean	isEmpty()	Tests if this vector has no components.

Get element index

Return	Method	Summary
int	indexOf(Object o)	Returns the index of the first occurrence of the specified element in this vector, or -1 if this vector does not contain the element.
int	indexOf(Object o, int index)	Returns the index of the first occurrence of the specified element in this vector, searching forwards from index, or returns -1 if the element is not found.
int	lastIndexOf(Object o)	Returns the index of the last occurrence of the specified element in this vector, or -1 if this vector does not contain the element.
int	lastIndexOf(Object o, int index)	Returns the index of the last occurrence of the specified element in this vector, searching backwards from index, or returns -1 if the element is not found.

Remove element from a vector

Return	Method	Summary
E	remove(int index)	Removes the element at the specified position in this Vector.
boolean	remove(Object o)	Removes the first occurrence of the specified element in this Vector If the Vector does not contain the element, it is unchanged.
boolean	removeAll(Collection<?> c)	Removes from this Vector all of its elements that are contained in the specified Collection.
void	removeAllElements()	Removes all components from this vector and sets its size to zero.
boolean	removeElement(Object obj)	Removes the first (lowest-indexed) occurrence of the argument from this vector.
void	removeElementAt(int index)	Deletes the component at the specified index.

Retain elements collection c has

Return	Method	Summary
boolean	retainAll(Collection<?> c)	Retains only the elements in this Vector that are contained in the specified Collection.

Replace element in a vector

Return	Method	Summary
E	set(int index, E element)	Replaces the element at the specified position in this Vector with the specified element.
void	setElementAt(E obj, int index)	Sets the component at the specified index of this vector to be the specified object.

Get a sub list from a list

Return	Method	Summary
List<E>	subList(int fromIndex, int toIndex)	Returns a view of the portion of this List between fromIndex, inclusive, and toIndex, exclusive.

Convert Vector to Array

Return	Method	Summary
Object[]	toArray()	Returns an array containing all of the elements in this Vector in the correct order.
<T> T[]	toArray(T[] a)	Returns an array containing all of the elements in this Vector in the correct order; the runtime type of the returned array is that of the specified array.
String	toString()	Returns a string representation of this Vector, containing the String representation of each element.