org.apache.tools.ant.util

## Class VectorSet

- java.lang.Object
- - java.util.AbstractCollection<E>
  - - java.util.AbstractList<E>
    - - java.util.Vector
      - - org.apache.tools.ant.util.VectorSet

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.List, java.util.RandomAccess

    public final class VectorSet
    extends java.util.Vector

Subclass of Vector that won't store duplicate entries and shows HashSet's constant time performance characteristics for the contains method.

This is not a general purpose class but has been written because the protected members of `DirectoryScanner` prohibited later revisions from using a more efficient collection.

Methods are synchronized to keep Vector's contract.

Since:
  Ant 1.8.0
See Also:
  Serialized Form

### Field Summary

### Fields inherited from class java.util.Vector

`capacityIncrement, elementCount, elementData`

### Fields inherited from class java.util.AbstractList

`modCount`

### Constructor Summary

Constructors
Constructor and Description
`VectorSet()`
`VectorSet(java.util.Collection c)`
`VectorSet(int initialCapacity)`
`VectorSet(int initialCapacity, int capacityIncrement)`

### Method Summary

Methods
`void` `add(int index, java.lang.Object o)` This implementation may not add the element at the given index if it is already contained in the collection.
`boolean` `add(java.lang.Object o)`
`boolean` `addAll(java.util.Collection c)`
`boolean` `addAll(int index, java.util.Collection c)` This implementation may not add all elements at the given index if any of them are already contained in the collection.
`void` `addElement(java.lang.Object o)`
`void` `clear()`
`java.lang.Object` `clone()`
`boolean` `contains(java.lang.Object o)`
`boolean` `containsAll(java.util.Collection c)`
`void` `insertElementAt(java.lang.Object o, int index)`
`java.lang.Object` `remove(int index)`
`boolean` `remove(java.lang.Object o)`
`boolean` `removeAll(java.util.Collection c)`
`void` `removeAllElements()`
`boolean` `removeElement(java.lang.Object o)`
`void` `removeElementAt(int index)`
`void` `removeRange(int fromIndex, int toIndex)`
`boolean` `retainAll(java.util.Collection c)`
`java.lang.Object` `set(int index, java.lang.Object o)`
`void` `setElementAt(java.lang.Object o, int index)`

### Methods inherited from class java.util.Vector

`capacity, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, get, hashCode, indexOf, indexOf, isEmpty, iterator, lastElement, lastIndexOf, lastIndexOf, listIterator, listIterator, setSize, size, subList, toArray, toArray, toString, trimToSize`

### Methods inherited from class java.lang.Object

`finalize, getClass, notify, notifyAll, wait, wait, wait`

### Constructor Detail

#### VectorSet

    public VectorSet()

#### VectorSet

    public VectorSet(int initialCapacity)

#### VectorSet

    public VectorSet(int initialCapacity,
             int capacityIncrement)

#### VectorSet

    public VectorSet(java.util.Collection c)

### Method Detail

#### add

    public boolean add(java.lang.Object o)

Specified by:
  `add` in interface `java.util.Collection`
Specified by:
  `add` in interface `java.util.List`
Overrides:
  `add` in class `java.util.Vector`

#### add

    public void add(int index,
           java.lang.Object o)

This implementation may not add the element at the given index if it is already contained in the collection.

Specified by:
  `add` in interface `java.util.List`
Overrides:
  `add` in class `java.util.Vector`

#### addElement

    public void addElement(java.lang.Object o)

Overrides:
  `addElement` in class `java.util.Vector`

#### addAll

    public boolean addAll(java.util.Collection c)

Specified by:
  `addAll` in interface `java.util.Collection`
Specified by:
  `addAll` in interface `java.util.List`
Overrides:
  `addAll` in class `java.util.Vector`

#### addAll

    public boolean addAll(int index,
                 java.util.Collection c)

This implementation may not add all elements at the given index if any of them are already contained in the collection.

Specified by:
  `addAll` in interface `java.util.List`
Overrides:
  `addAll` in class `java.util.Vector`

#### clear

    public void clear()

Specified by:
  `clear` in interface `java.util.Collection`
Specified by:
  `clear` in interface `java.util.List`
Overrides:
  `clear` in class `java.util.Vector`

#### clone

    public java.lang.Object clone()

Overrides:
  `clone` in class `java.util.Vector`

#### contains

    public boolean contains(java.lang.Object o)

Specified by:
  `contains` in interface `java.util.Collection`
Specified by:
  `contains` in interface `java.util.List`
Overrides:
  `contains` in class `java.util.Vector`

#### containsAll

    public boolean containsAll(java.util.Collection c)

Specified by:
  `containsAll` in interface `java.util.Collection`
Specified by:
  `containsAll` in interface `java.util.List`
Overrides:
  `containsAll` in class `java.util.Vector`

#### insertElementAt

    public void insertElementAt(java.lang.Object o,
                       int index)

Overrides:
  `insertElementAt` in class `java.util.Vector`

#### remove

    public java.lang.Object remove(int index)

Specified by:
  `remove` in interface `java.util.List`
Overrides:
  `remove` in class `java.util.Vector`

#### remove

    public boolean remove(java.lang.Object o)

Specified by:
  `remove` in interface `java.util.Collection`
Specified by:
  `remove` in interface `java.util.List`
Overrides:
  `remove` in class `java.util.Vector`

#### removeAll

    public boolean removeAll(java.util.Collection c)

Specified by:
  `removeAll` in interface `java.util.Collection`
Specified by:
  `removeAll` in interface `java.util.List`
Overrides:
  `removeAll` in class `java.util.Vector`

#### removeAllElements

    public void removeAllElements()

Overrides:
  `removeAllElements` in class `java.util.Vector`

#### removeElement

    public boolean removeElement(java.lang.Object o)

Overrides:
  `removeElement` in class `java.util.Vector`

#### removeElementAt

    public void removeElementAt(int index)

Overrides:
  `removeElementAt` in class `java.util.Vector`

#### removeRange

    public void removeRange(int fromIndex,
                   int toIndex)

Overrides:
  `removeRange` in class `java.util.Vector`

#### retainAll

    public boolean retainAll(java.util.Collection c)

Specified by:
  `retainAll` in interface `java.util.Collection`
Specified by:
  `retainAll` in interface `java.util.List`
Overrides:
  `retainAll` in class `java.util.Vector`

#### set

    public java.lang.Object set(int index,
                       java.lang.Object o)

Specified by:
  `set` in interface `java.util.List`
Overrides:
  `set` in class `java.util.Vector`

#### setElementAt

    public void setElementAt(java.lang.Object o,
                    int index)

Overrides:
  `setElementAt` in class `java.util.Vector`