The removeIf() method of LinkedBlockingDeque removes the element from this LinkedBlockingDeque that satisfies the specified condition.
Syntax:
public boolean removeIf (Predicate<? super E> filter)
Parameters: This method accepts a mandatory parameter filter which is the predicate value based on which elements are removed from this Deque.
Returns: This method returns a boolean value such as true, if the LinkedBlockingDeque is changed. Else this method returns false.
Exceptions: This method throws NullPointerException if the specified Predicate filter is null.
Below program illustrates the removeIf() function of LinkedBlockingDeque class :
Program 1:
// Java Program Demonstrate removeIf() // 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.add( 7855642 );         LBD.add( 35658786 );         LBD.add( 5278367 );         LBD.add( 74381793 );           // Print Deque         System.out.println( "Linked Blocking Deque: "                            + LBD);           // If a number in the List is         // divisible by 3, then remove it         LBD.removeIf(number -> number % 3 == 0 );           System.out.println( "Linked Blocking Deque: "                            + LBD);     } } |
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793] Linked Blocking Deque: [7855642, 5278367]
Program 2:
// Java Program Demonstrate removeIf() // 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.add( 7855642 );         LBD.add( 35658786 );         LBD.add( 5278367 );         LBD.add( 74381793 );           // Print Dequeue         System.out.println( "Linked Blocking Deque: "                            + LBD);           try {             // if the predicate is null,             // then it will throw NullPointerException             LBD.removeIf( null );         }         catch (Exception e) {             System.out.println(e);         }     } } |
Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793] java.lang.NullPointerException