LinkedBlockingDeque forEach() method in Java with Examples

The forEach() method of LinkedBlockingDeque performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception.

Syntax:

public void forEach(Consumer<E> action)

Parameters: This method takes a parameter action which represents the action to be performed for each element.



Return Value: This method does not returns anything.

Exceptions: This method throws NullPointerException if the specified action is null.

Below program illustrates the forEach() function of LinkedBlockingDeque class:

Example:

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// Java Program Demonstrate forEach()
// method of LinkedBlockingDeque
  
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {
  
        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD
            = new LinkedBlockingDeque<Integer>();
  
        // Add numbers to end of LinkedBlockingDeque
        LBD.add(11);
        LBD.add(22);
        LBD.add(33);
        LBD.add(44);
        LBD.add(55);
        LBD.add(66);
        LBD.add(77);
  
        // print deque
        System.out.println("Linked Blocking Deque: "
                           + LBD);
  
        System.out.println("Traversing this Deque: ");
  
        // Traverse this queue using forEach() method
        LBD.forEach((n) -> System.out.println(n));
    }
}

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Output:

Linked Blocking Deque: [11, 22, 33, 44, 55, 66, 77]
Traversing this Deque: 
11
22
33
44
55
66
77

Example: 2

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// Java Program Demonstrate forEach()
// method of LinkedBlockingDeque
  
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {
  
        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<String> LBD
            = new LinkedBlockingDeque<String>();
  
        // Add elements to end of LinkedBlockingDeque
        LBD.add("GeeksforGeeks");
        LBD.add("Gfg");
        LBD.add("Geeks");
        LBD.add("Computer");
        LBD.add("Science");
        LBD.add("Portal");
  
        // print deque
        System.out.println("Linked Blocking Deque: "
                           + LBD);
  
        System.out.println("Traversing this deque: ");
  
        // Traverse this deque using forEach() method
        LBD.forEach((n) -> System.out.println(n));
    }
}

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Output:

Linked Blocking Deque: [GeeksforGeeks, Gfg, Geeks, Computer, Science, Portal]
Traversing this deque: 
GeeksforGeeks
Gfg
Geeks
Computer
Science
Portal

Reference: https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/LinkedBlockingDeque.html#forEach-java.util.function.Consumer-



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