THE PACKAGE JAVA.UTIL

java.util.Vector

21.11

21.11.11

public final Object firstElement()

throws NoSuchElementException

If this

Vector

 is empty, a

NoSuchElementException

 is thrown. Otherwise, the

first item (the item at index

0

) is returned.

21.11.12

public final Object lastElement()

throws NoSuchElementException

If this

Vector

 is empty, a

NoSuchElementException

 is thrown. Otherwise, the

last item (the item at index

size() 1

) is returned.

21.11.13

public final void addElement(Object obj)

The size of this

Vector

 is increased by

1

 and

obj

 becomes the new last item.

21.11.14

public final void insertElementAt(Object obj, int index)

throws IndexOutOfBoundsException

The size of this

Vector

 is increased by

1

 and

obj

 becomes the new item at the

specified

index

. Any item in this

Vector

 that was previously at index

k

 is first

moved to index

k+1

 if and only if

k

 is not less than

index

.

21.11.15

public final boolean removeElement(Object obj)

If this

Vector

 contains an occurrence of

obj

, then the first (lowest indexed) such

occurrence is removed, as if by the method

removeElementAt

 ( 21.11.16), and

true

 is returned. If this

Vector

 contains no occurrence of

obj

, this

Vector

 is not

modified and

false

 is returned.

21.11.16

public final void removeElementAt(int index)

throws IndexOutOfBoundsException

The size of this

Vector

 is decreased by

1

 and the item at the specified

index

 is

removed from this

Vector

. Any item in this

Vector

 that was previously at index

k

 is first moved to index

k 1

 if and only if

k

 is greater than

index

.

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