java.lang.Object
- org.apache.commons.collections.collection.SynchronizedCollection

All Implemented Interfaces:

Serializable, Iterable, Collection

Direct Known Subclasses:

SynchronizedBag, SynchronizedBuffer, SynchronizedList, SynchronizedSet, SynchronizedSortedSet
```
public class SynchronizedCollection
extends Object
implements Collection, Serializable
```
Decorates another Collection to synchronize its behaviour for a multi-threaded environment.
Iterators must be manually synchronized:
```
 synchronized (coll) {
   Iterator it = coll.iterator();
   // do stuff with iterator
 }
 
```
This class is Serializable from Commons Collections 3.1.
Since:

Commons Collections 3.0

Version:

$Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $

Author:

Stephen Colebourne

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected Collection collection
The collection to decorate

protected Object lock
The object to lock on, needed for List/SortedSet views

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`SynchronizedCollection(Collection collection)`	Constructor that wraps (not copies).
`protected`	`SynchronizedCollection(Collection collection, Object lock)`	Constructor that wraps (not copies).

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`add(Object object)`
`boolean`	`addAll(Collection coll)`
`void`	`clear()`
`boolean`	`contains(Object object)`
`boolean`	`containsAll(Collection coll)`
`static Collection`	`decorate(Collection coll)`	Factory method to create a synchronized collection.
`boolean`	`equals(Object object)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Iterator`	`iterator()`	Iterators must be manually synchronized.
`boolean`	`remove(Object object)`
`boolean`	`removeAll(Collection coll)`
`boolean`	`retainAll(Collection coll)`
`int`	`size()`
`Object[]`	`toArray()`
`Object[]`	`toArray(Object[] object)`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection
parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable
forEach

- Field Detail
  - collection
```
protected final Collection collection
```
    The collection to decorate
  - lock
```
protected final Object lock
```
    The object to lock on, needed for List/SortedSet views
- Constructor Detail
  - SynchronizedCollection
```
protected SynchronizedCollection(Collection collection)
```
    Constructor that wraps (not copies).
    
    Parameters:
    
    collection - the collection to decorate, must not be null
    
    Throws:
    
    IllegalArgumentException - if the collection is null
  - SynchronizedCollection
```
protected SynchronizedCollection(Collection collection,
                                 Object lock)
```
    Constructor that wraps (not copies).
    
    Parameters:
    
    collection - the collection to decorate, must not be null
    
    lock - the lock object to use, must not be null
    
    Throws:
    
    IllegalArgumentException - if the collection is null
- Method Detail
  - decorate
```
public static Collection decorate(Collection coll)
```
    Factory method to create a synchronized collection.
    
    Parameters:
    
    coll - the collection to decorate, must not be null
    
    Returns:
    
    a new synchronized collection
    
    Throws:
    
    IllegalArgumentException - if collection is null
  - add
```
public boolean add(Object object)
```
    Specified by:
    
    add in interface Collection
  - addAll
```
public boolean addAll(Collection coll)
```
    Specified by:
    
    addAll in interface Collection
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface Collection
  - contains
```
public boolean contains(Object object)
```
    Specified by:
    
    contains in interface Collection
  - containsAll
```
public boolean containsAll(Collection coll)
```
    Specified by:
    
    containsAll in interface Collection
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface Collection
  - iterator
```
public Iterator iterator()
```
    Iterators must be manually synchronized.
    synchronized (coll) { Iterator it = coll.iterator(); // do stuff with iterator }
    Specified by:
    
    iterator in interface Collection
    
    Specified by:
    
    iterator in interface Iterable
    
    Returns:
    
    an iterator that must be manually synchronized on the collection
  - toArray
```
public Object[] toArray()
```
    Specified by:
    
    toArray in interface Collection
  - toArray
```
public Object[] toArray(Object[] object)
```
    Specified by:
    
    toArray in interface Collection
  - remove
```
public boolean remove(Object object)
```
    Specified by:
    
    remove in interface Collection
  - removeAll
```
public boolean removeAll(Collection coll)
```
    Specified by:
    
    removeAll in interface Collection
  - retainAll
```
public boolean retainAll(Collection coll)
```
    Specified by:
    
    retainAll in interface Collection
  - size
```
public int size()
```
    Specified by:
    
    size in interface Collection
  - equals
```
public boolean equals(Object object)
```
    Specified by:
    
    equals in interface Collection
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in interface Collection
    
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Modifier and Type	Field	Description
`protected Collection`	`collection`	The collection to decorate
`protected Object`	`lock`	The object to lock on, needed for List/SortedSet views

Class SynchronizedCollection

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Field Detail

collection

lock

Constructor Detail

SynchronizedCollection

SynchronizedCollection

Method Detail

decorate

add

addAll

clear

contains

containsAll

isEmpty

iterator

toArray

toArray

remove

removeAll

retainAll

size

equals

hashCode

toString