The
addAll() method of
ConcurrentLinkedQueue is used to inserts all the elements of the Collection, passed as parameter to this method, at the end of a ConcurrentLinkedQueue. The insertion of element is in same order as returned by the collections iterator.
Syntax:
public boolean addAll(Collection<? extends E> c)
Parameter: This method takes a parameter
cwhich represent collection whose elements are needed to be appended at the end of this ConcurrentLinkedQueue.
Returns: This method returns
true if at least one action of insertion is performed.
Exception: This method throw two different Exceptions:
- NullPointerException - if the passed collection or any of its elements are null.
- IllegalArgumentException - if the passed collection is this queue itself.
Below programs illustrate addAll() method of ConcurrentLinkedQueue:
Example 1: Trying to add a list of numbers to ConcurrentLinkedQueue.
Output:
ConcurrentLinkedQueue: [4353]
Collection to be added: [377139, 624378, 654793, 764764, 838494, 632845]
Collection added: true
ConcurrentLinkedQueue: [4353, 377139, 624378, 654793, 764764, 838494, 632845]
Example 2: Trying to add a list of Strings to ConcurrentLinkedQueue.
Output:
ConcurrentLinkedQueue: [Aman, Amar]
Collection to be added: [Sanjeet, Rabi, Debasis, Raunak, Mahesh]
Collection added: true
ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi, Debasis, Raunak, Mahesh]
Example 3: Showing
NullPointerException
Output:
ConcurrentLinkedQueue: [Aman, Amar]
Collection to be added: null
Exception thrown while adding null: java.lang.NullPointerException
Example 4: Showing IllegalArgumentException
