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java.util.concurrent
Class LinkedBlockingQueue<E>

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.util.AbstractCollection sample code for java.util.AbstractCollection definition code for java.util.AbstractCollection <E>
      extended by java.util.AbstractQueue sample code for java.util.AbstractQueue definition code for java.util.AbstractQueue <E>
          extended by java.util.concurrent.LinkedBlockingQueue<E>
Type Parameters:
E - the type of elements held in this collection
All Implemented Interfaces:
Serializable sample code for java.io.Serializable definition code for java.io.Serializable , Iterable sample code for java.lang.Iterable definition code for java.lang.Iterable <E>, Collection sample code for java.util.Collection definition code for java.util.Collection <E>, BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>, Queue sample code for java.util.Queue definition code for java.util.Queue <E>
public class LinkedBlockingQueue<E>
extends AbstractQueue sample code for java.util.AbstractQueue definition code for java.util.AbstractQueue <E>
implements BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>, Serializable sample code for java.io.Serializable definition code for java.io.Serializable

An optionally-bounded blocking queue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue based on linked nodes. This queue orders elements FIFO (first-in-first-out). The head of the queue is that element that has been on the queue the longest time. The tail of the queue is that element that has been on the queue the shortest time. New elements are inserted at the tail of the queue, and the queue retrieval operations obtain elements at the head of the queue. Linked queues typically have higher throughput than array-based queues but less predictable performance in most concurrent applications.

The optional capacity bound constructor argument serves as a way to prevent excessive queue expansion. The capacity, if unspecified, is equal to Integer.MAX_VALUE sample code for java.lang.Integer.MAX_VALUE definition code for java.lang.Integer.MAX_VALUE . Linked nodes are dynamically created upon each insertion unless this would bring the queue above capacity.

This class and its iterator implement all of the optional methods of the Collection sample code for java.util.Collection definition code for java.util.Collection and Iterator sample code for java.util.Iterator definition code for java.util.Iterator interfaces.

This class is a member of the Java Collections Framework.

Since:
1.5
See Also:
Serialized Form

Constructor Summary
LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue() definition code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue() ()
          Creates a LinkedBlockingQueue with a capacity of Integer.MAX_VALUE sample code for java.lang.Integer.MAX_VALUE definition code for java.lang.Integer.MAX_VALUE .
LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue(java.util.Collection) definition code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue(java.util.Collection) (Collection sample code for java.util.Collection definition code for java.util.Collection <? extends E> c)
          Creates a LinkedBlockingQueue with a capacity of Integer.MAX_VALUE sample code for java.lang.Integer.MAX_VALUE definition code for java.lang.Integer.MAX_VALUE , initially containing the elements of the given collection, added in traversal order of the collection's iterator.
LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue(int) definition code for java.util.concurrent.LinkedBlockingQueue.LinkedBlockingQueue(int) (int capacity)
          Creates a LinkedBlockingQueue with the given (fixed) capacity.
 
Method Summary
 void clear sample code for java.util.concurrent.LinkedBlockingQueue.clear() definition code for java.util.concurrent.LinkedBlockingQueue.clear() ()
          Atomically removes all of the elements from this queue.
 int drainTo sample code for java.util.concurrent.LinkedBlockingQueue.drainTo(java.util.Collection) definition code for java.util.concurrent.LinkedBlockingQueue.drainTo(java.util.Collection) (Collection sample code for java.util.Collection definition code for java.util.Collection <? super E> c)
          Removes all available elements from this queue and adds them into the given collection.
 int drainTo sample code for java.util.concurrent.LinkedBlockingQueue.drainTo(java.util.Collection, int) definition code for java.util.concurrent.LinkedBlockingQueue.drainTo(java.util.Collection, int) (Collection sample code for java.util.Collection definition code for java.util.Collection <? super E> c, int maxElements)
          Removes at most the given number of available elements from this queue and adds them into the given collection.
 Iterator sample code for java.util.Iterator definition code for java.util.Iterator <E> iterator sample code for java.util.concurrent.LinkedBlockingQueue.iterator() definition code for java.util.concurrent.LinkedBlockingQueue.iterator() ()
          Returns an iterator over the elements in this queue in proper sequence.
 boolean offer sample code for java.util.concurrent.LinkedBlockingQueue.offer(E) definition code for java.util.concurrent.LinkedBlockingQueue.offer(E) (E o)
          Inserts the specified element at the tail of this queue if possible, returning immediately if this queue is full.
 boolean offer sample code for java.util.concurrent.LinkedBlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.LinkedBlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) (E o, long timeout, TimeUnit sample code for java.util.concurrent.TimeUnit definition code for java.util.concurrent.TimeUnit  unit)
          Inserts the specified element at the tail of this queue, waiting if necessary up to the specified wait time for space to become available.
 E peek sample code for java.util.concurrent.LinkedBlockingQueue.peek() definition code for java.util.concurrent.LinkedBlockingQueue.peek() ()
          Retrieves, but does not remove, the head of this queue, returning null if this queue is empty.
 E poll sample code for java.util.concurrent.LinkedBlockingQueue.poll() definition code for java.util.concurrent.LinkedBlockingQueue.poll() ()
          Retrieves and removes the head of this queue, or null if this queue is empty.
 E poll sample code for java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) (long timeout, TimeUnit sample code for java.util.concurrent.TimeUnit definition code for java.util.concurrent.TimeUnit  unit)
          Retrieves and removes the head of this queue, waiting if necessary up to the specified wait time if no elements are present on this queue.
 void put sample code for java.util.concurrent.LinkedBlockingQueue.put(E) definition code for java.util.concurrent.LinkedBlockingQueue.put(E) (E o)
          Adds the specified element to the tail of this queue, waiting if necessary for space to become available.
 int remainingCapacity sample code for java.util.concurrent.LinkedBlockingQueue.remainingCapacity() definition code for java.util.concurrent.LinkedBlockingQueue.remainingCapacity() ()
          Returns the number of elements that this queue can ideally (in the absence of memory or resource constraints) accept without blocking.
 boolean remove sample code for java.util.concurrent.LinkedBlockingQueue.remove(java.lang.Object) definition code for java.util.concurrent.LinkedBlockingQueue.remove(java.lang.Object) (Object sample code for java.lang.Object definition code for java.lang.Object  o)
          Removes a single instance of the specified element from this queue, if it is present.
 int size sample code for java.util.concurrent.LinkedBlockingQueue.size() definition code for java.util.concurrent.LinkedBlockingQueue.size() ()
          Returns the number of elements in this queue.
 E take sample code for java.util.concurrent.LinkedBlockingQueue.take() definition code for java.util.concurrent.LinkedBlockingQueue.take() ()
          Retrieves and removes the head of this queue, waiting if no elements are present on this queue.
 Object sample code for java.lang.Object definition code for java.lang.Object [] toArray sample code for java.util.concurrent.LinkedBlockingQueue.toArray() definition code for java.util.concurrent.LinkedBlockingQueue.toArray() ()
          Returns an array containing all of the elements in this collection.
<T> T[]
toArray sample code for java.util.concurrent.LinkedBlockingQueue.toArray(T[]) definition code for java.util.concurrent.LinkedBlockingQueue.toArray(T[]) (T[] a)
          Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array.
 String sample code for java.lang.String definition code for java.lang.String toString sample code for java.util.concurrent.LinkedBlockingQueue.toString() definition code for java.util.concurrent.LinkedBlockingQueue.toString() ()
          Returns a string representation of this collection.
 
Methods inherited from class java.util.AbstractQueue sample code for java.util.AbstractQueue definition code for java.util.AbstractQueue
add sample code for java.util.AbstractQueue.add(E) definition code for java.util.AbstractQueue.add(E) , addAll sample code for java.util.AbstractQueue.addAll(java.util.Collection) definition code for java.util.AbstractQueue.addAll(java.util.Collection) , element sample code for java.util.AbstractQueue.element() definition code for java.util.AbstractQueue.element() , remove sample code for java.util.AbstractQueue.remove() definition code for java.util.AbstractQueue.remove()
 
Methods inherited from class java.util.AbstractCollection sample code for java.util.AbstractCollection definition code for java.util.AbstractCollection
contains sample code for java.util.AbstractCollection.contains(java.lang.Object) definition code for java.util.AbstractCollection.contains(java.lang.Object) , containsAll sample code for java.util.AbstractCollection.containsAll(java.util.Collection) definition code for java.util.AbstractCollection.containsAll(java.util.Collection) , isEmpty sample code for java.util.AbstractCollection.isEmpty() definition code for java.util.AbstractCollection.isEmpty() , removeAll sample code for java.util.AbstractCollection.removeAll(java.util.Collection) definition code for java.util.AbstractCollection.removeAll(java.util.Collection) , retainAll sample code for java.util.AbstractCollection.retainAll(java.util.Collection) definition code for java.util.AbstractCollection.retainAll(java.util.Collection)
 
Methods inherited from class java.lang.Object sample code for java.lang.Object definition code for java.lang.Object
clone sample code for java.lang.Object.clone() definition code for java.lang.Object.clone() , equals sample code for java.lang.Object.equals(java.lang.Object) definition code for java.lang.Object.equals(java.lang.Object) , finalize sample code for java.lang.Object.finalize() definition code for java.lang.Object.finalize() , getClass sample code for java.lang.Object.getClass() definition code for java.lang.Object.getClass() , hashCode sample code for java.lang.Object.hashCode() definition code for java.lang.Object.hashCode() , notify sample code for java.lang.Object.notify() definition code for java.lang.Object.notify() , notifyAll sample code for java.lang.Object.notifyAll() definition code for java.lang.Object.notifyAll() , wait sample code for java.lang.Object.wait() definition code for java.lang.Object.wait() , wait sample code for java.lang.Object.wait(long) definition code for java.lang.Object.wait(long) , wait sample code for java.lang.Object.wait(long, int) definition code for java.lang.Object.wait(long, int)
 
Methods inherited from interface java.util.concurrent.BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue
add sample code for java.util.concurrent.BlockingQueue.add(E) definition code for java.util.concurrent.BlockingQueue.add(E)
 
Methods inherited from interface java.util.Queue sample code for java.util.Queue definition code for java.util.Queue
element sample code for java.util.Queue.element() definition code for java.util.Queue.element() , remove sample code for java.util.Queue.remove() definition code for java.util.Queue.remove()
 
Methods inherited from interface java.util.Collection sample code for java.util.Collection definition code for java.util.Collection
addAll sample code for java.util.Collection.addAll(java.util.Collection) definition code for java.util.Collection.addAll(java.util.Collection) , contains sample code for java.util.Collection.contains(java.lang.Object) definition code for java.util.Collection.contains(java.lang.Object) , containsAll sample code for java.util.Collection.containsAll(java.util.Collection) definition code for java.util.Collection.containsAll(java.util.Collection) , equals sample code for java.util.Collection.equals(java.lang.Object) definition code for java.util.Collection.equals(java.lang.Object) , hashCode sample code for java.util.Collection.hashCode() definition code for java.util.Collection.hashCode() , isEmpty sample code for java.util.Collection.isEmpty() definition code for java.util.Collection.isEmpty() , removeAll sample code for java.util.Collection.removeAll(java.util.Collection) definition code for java.util.Collection.removeAll(java.util.Collection) , retainAll sample code for java.util.Collection.retainAll(java.util.Collection) definition code for java.util.Collection.retainAll(java.util.Collection)
 

Constructor Detail

LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue() definition code for java.util.concurrent.LinkedBlockingQueue() 

public LinkedBlockingQueue()
Creates a LinkedBlockingQueue with a capacity of Integer.MAX_VALUE sample code for java.lang.Integer.MAX_VALUE definition code for java.lang.Integer.MAX_VALUE .

LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue(int) definition code for java.util.concurrent.LinkedBlockingQueue(int) 

public LinkedBlockingQueue(int capacity)
Creates a LinkedBlockingQueue with the given (fixed) capacity.

Parameters:
capacity - the capacity of this queue.
Throws:
IllegalArgumentException sample code for java.lang.IllegalArgumentException definition code for java.lang.IllegalArgumentException - if capacity is not greater than zero.

LinkedBlockingQueue sample code for java.util.concurrent.LinkedBlockingQueue(java.util.Collection<? extends E>) definition code for java.util.concurrent.LinkedBlockingQueue(java.util.Collection<? extends E>) 

public LinkedBlockingQueue(Collection sample code for java.util.Collection definition code for java.util.Collection <? extends E> c)
Creates a LinkedBlockingQueue with a capacity of Integer.MAX_VALUE sample code for java.lang.Integer.MAX_VALUE definition code for java.lang.Integer.MAX_VALUE , initially containing the elements of the given collection, added in traversal order of the collection's iterator.

Parameters:
c - the collection of elements to initially contain
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if c or any element within it is null
Method Detail

size sample code for java.util.concurrent.LinkedBlockingQueue.size() definition code for java.util.concurrent.LinkedBlockingQueue.size() 

public int size()
Returns the number of elements in this queue.

Specified by:
size sample code for java.util.Collection.size() definition code for java.util.Collection.size() in interface Collection sample code for java.util.Collection definition code for java.util.Collection <E>
Specified by:
size sample code for java.util.AbstractCollection.size() definition code for java.util.AbstractCollection.size() in class AbstractCollection sample code for java.util.AbstractCollection definition code for java.util.AbstractCollection <E>
Returns:
the number of elements in this queue.

remainingCapacity sample code for java.util.concurrent.LinkedBlockingQueue.remainingCapacity() definition code for java.util.concurrent.LinkedBlockingQueue.remainingCapacity() 

public int remainingCapacity()
Returns the number of elements that this queue can ideally (in the absence of memory or resource constraints) accept without blocking. This is always equal to the initial capacity of this queue less the current size of this queue.

Note that you cannot always tell if an attempt to add an element will succeed by inspecting remainingCapacity because it may be the case that a waiting consumer is ready to take an element out of an otherwise full queue.

Specified by:
remainingCapacity sample code for java.util.concurrent.BlockingQueue.remainingCapacity() definition code for java.util.concurrent.BlockingQueue.remainingCapacity() in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Returns:
the remaining capacity

put sample code for java.util.concurrent.LinkedBlockingQueue.put(E) definition code for java.util.concurrent.LinkedBlockingQueue.put(E) 

public void put(E o)
         throws InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException
Adds the specified element to the tail of this queue, waiting if necessary for space to become available.

Specified by:
put sample code for java.util.concurrent.BlockingQueue.put(E) definition code for java.util.concurrent.BlockingQueue.put(E) in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Parameters:
o - the element to add
Throws:
InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException - if interrupted while waiting.
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if the specified element is null.

offer sample code for java.util.concurrent.LinkedBlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.LinkedBlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) 

public boolean offer(E o,
                     long timeout,
                     TimeUnit sample code for java.util.concurrent.TimeUnit definition code for java.util.concurrent.TimeUnit  unit)
              throws InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException
Inserts the specified element at the tail of this queue, waiting if necessary up to the specified wait time for space to become available.

Specified by:
offer sample code for java.util.concurrent.BlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.BlockingQueue.offer(E, long, java.util.concurrent.TimeUnit) in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Parameters:
o - the element to add
timeout - how long to wait before giving up, in units of unit
unit - a TimeUnit determining how to interpret the timeout parameter
Returns:
true if successful, or false if the specified waiting time elapses before space is available.
Throws:
InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException - if interrupted while waiting.
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if the specified element is null.

offer sample code for java.util.concurrent.LinkedBlockingQueue.offer(E) definition code for java.util.concurrent.LinkedBlockingQueue.offer(E) 

public boolean offer(E o)
Inserts the specified element at the tail of this queue if possible, returning immediately if this queue is full.

Specified by:
offer sample code for java.util.concurrent.BlockingQueue.offer(E) definition code for java.util.concurrent.BlockingQueue.offer(E) in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Specified by:
offer sample code for java.util.Queue.offer(E) definition code for java.util.Queue.offer(E) in interface Queue sample code for java.util.Queue definition code for java.util.Queue <E>
Parameters:
o - the element to add.
Returns:
true if it was possible to add the element to this queue, else false
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if the specified element is null

take sample code for java.util.concurrent.LinkedBlockingQueue.take() definition code for java.util.concurrent.LinkedBlockingQueue.take() 

public E take()
       throws InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException
Description copied from interface: BlockingQueue sample code for java.util.concurrent.BlockingQueue.take() definition code for java.util.concurrent.BlockingQueue.take()
Retrieves and removes the head of this queue, waiting if no elements are present on this queue.

Specified by:
take sample code for java.util.concurrent.BlockingQueue.take() definition code for java.util.concurrent.BlockingQueue.take() in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Returns:
the head of this queue
Throws:
InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException - if interrupted while waiting.

poll sample code for java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) 

public E poll(long timeout,
              TimeUnit sample code for java.util.concurrent.TimeUnit definition code for java.util.concurrent.TimeUnit  unit)
       throws InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException
Description copied from interface: BlockingQueue sample code for java.util.concurrent.BlockingQueue.poll(long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.BlockingQueue.poll(long, java.util.concurrent.TimeUnit)
Retrieves and removes the head of this queue, waiting if necessary up to the specified wait time if no elements are present on this queue.

Specified by:
poll sample code for java.util.concurrent.BlockingQueue.poll(long, java.util.concurrent.TimeUnit) definition code for java.util.concurrent.BlockingQueue.poll(long, java.util.concurrent.TimeUnit) in interface BlockingQueue sample code for java.util.concurrent.BlockingQueue definition code for java.util.concurrent.BlockingQueue <E>
Parameters:
timeout - how long to wait before giving up, in units of unit
unit - a TimeUnit determining how to interpret the timeout parameter
Returns:
the head of this queue, or null if the specified waiting time elapses before an element is present.
Throws:
InterruptedException sample code for java.lang.InterruptedException definition code for java.lang.InterruptedException - if interrupted while waiting.

poll sample code for java.util.concurrent.LinkedBlockingQueue.poll() definition code for java.util.concurrent.LinkedBlockingQueue.poll() 

public E poll()
Description copied from interface: Queue sample code for java.util.Queue.poll() definition code for java.util.Queue.poll()
Retrieves and removes the head of this queue, or null if this queue is empty.

Specified by:
poll sample code for java.util.Queue.poll() definition code for java.util.Queue.poll() in interface Queue sample code for java.util.Queue definition code for java.util.Queue <E>
Returns:
the head of this queue, or null if this queue is empty.

peek sample code for java.util.concurrent.LinkedBlockingQueue.peek() definition code for java.util.concurrent.LinkedBlockingQueue.peek() 

public E peek()
Description copied from interface: Queue sample code for java.util.Queue.peek() definition code for java.util.Queue.peek()
Retrieves, but does not remove, the head of this queue, returning null if this queue is empty.

Specified by:
peek sample code for java.util.Queue.peek() definition code for java.util.Queue.peek() in interface Queue sample code for java.util.Queue definition code for java.util.Queue <E>
Returns:
the head of this queue, or null if this queue is empty.

remove sample code for java.util.concurrent.LinkedBlockingQueue.remove(java.lang.Object) definition code for java.util.concurrent.LinkedBlockingQueue.remove(java.lang.Object) 

public boolean remove(Object sample code for java.lang.Object definition code for java.lang.Object  o)
Removes a single instance of the specified element from this queue, if it is present.

Specified by:
remove sample code for java.util.Collection.remove(java.lang.Object) definition code for java.util.Collection.remove(java.lang.Object) in interface Collection sample code for java.util.Collection definition code for java.util.Collection <E>
Overrides:
remove sample code for java.util.AbstractCollection.remove(java.lang.Object) definition code for java.util.AbstractCollection.remove(java.lang.Object) in class AbstractCollection sample code for java.util.AbstractCollection definition code for java.util.AbstractCollection <E>
Parameters:
o - element to be removed from this collection, if present.
Returns:
true if the collection contained the specified element.

toArray sample code for java.util.concurrent.LinkedBlockingQueue.toArray() definition code for java.util.concurrent.LinkedBlockingQueue.toArray() 

public Object sample code for java.lang.Object definition code for java.lang.Object [] toArray()
Description copied from class: AbstractCollection sample code for java.util.AbstractCollection.toArray() definition code for java.util.AbstractCollection.toArray()
Returns an array containing all of the elements in this collection. If the collection makes any guarantees as to what order its elements are returned by its iterator, this method must return the elements in the same order. The returned array will be "safe" in that no references to it are maintained by the collection. (In other words, this method must allocate a new array even if the collection is backed by an Array). The caller is thus free to modify the returned array.

This implementation allocates the array to be returned, and iterates over the elements in the collection, storing each object reference in the next consecutive element of the array, starting with element 0.

Specified by:
toArray sample code for java.util.Collection.toArray() definition code for java.util.Collection.toArray() in interface Collection sample code for java.util.Collection definition code for java.util.Collection <E>
Overrides:
toArray sample code for java.util.AbstractCollection.toArray() definition code for java.util.AbstractCollection.toArray() in class AbstractCollection sample code for java.util.AbstractCollection definition code for java.util.AbstractCollection <E>
Returns:
an array containing all of the elements in this collection.

toArray sample code for java.util.concurrent.LinkedBlockingQueue.<T>toArray(T[]) definition code for java.util.concurrent.LinkedBlockingQueue.<T>toArray(T[]) 

public <T> T[] toArray(T[] a)
Description copied from class: AbstractCollection sample code for java.util.AbstractCollection.toArray(T[]) definition code for java.util.AbstractCollection.toArray(T[])
Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array. If the collection fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this collection.

If the collection fits in the specified array with room to spare (i.e., the array has more e