LinkedBlockingDeque putLast() method in Java
Last Updated :
17 Sep, 2018
The
putLast(E e) method of
LinkedBlockingDeque inserts the specified element into the queue represented by this deque (in other words, at the tail/end of this deque). If the Deque is capacity restricted, then it will wait for the space to become available.
Syntax:
public void putLast(E e)
Parameters: This method accepts a mandatory parameter
e which is the element to be inserted at the end of the LinkedBlockingDeque.
Returns: This method does not return anything.
Exceptions: The program throws two exceptions as shown below:
- NullPointerException - if the specified element is null
- InterruptedException - if interrupted while waiting
Below programs illustrate putLast() method of LinkedBlockingDeque:
Program 1:
Java
// Java Program Demonstrate putLast()
// method of LinkedBlockingDeque
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// create object of LinkedBlockingDeque
LinkedBlockingDeque<Integer> LBD
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of LinkedBlockingDeque
LBD.putLast(7855642);
LBD.putLast(35658786);
LBD.putLast(5278367);
LBD.putLast(74381793);
// print Dequeue
System.out.println("Linked Blocking Deque: " + LBD);
}
}
Output:
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Program 2:
Java
// Java Program Demonstrate putLast()
// method of LinkedBlockingDeque
// throwing NullPointerException
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// create object of LinkedBlockingDeque
LinkedBlockingDeque<Integer> LBD
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of LinkedBlockingDeque
LBD.putLast(7855642);
LBD.putLast(35658786);
LBD.putLast(5278367);
// throws an exception
LBD.putLast(null);
// print Dequeue
System.out.println("Linked Blocking Deque: " + LBD);
}
}
:
Runtime Errors:
Exception in thread "main" java.lang.NullPointerException
at java.util.concurrent.LinkedBlockingDeque.putLast(LinkedBlockingDeque.java:390)
at GFG.main(GFG.java:23)
Program 3:
Java
// Java Program Demonstrate putLast()
// method of LinkedBlockingDeque
// when capacity exceeded
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws InterruptedException
{
// create object of LinkedBlockingDeque
LinkedBlockingDeque<Integer> LBD
= new LinkedBlockingDeque<Integer>(3);
// Add numbers to end of LinkedBlockingDeque
LBD.putLast(7855642);
LBD.putLast(35658786);
LBD.putLast(5278367);
// throws an exception
LBD.putLast(4356789);
// print Dequeue
System.out.println("Linked Blocking Deque: " + LBD);
}
}
:
Runtime Errors:
Max real time limit exceeded due to either by heavy
load on server or by using sleep function
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#putLast-E-
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