LinkedBlockingDeque clear() method in Java

The clear() method of LinkedBlockingDeque erases all the elements that are present in the LinkedBlockingDeque container. The container becomes empty after the function is called.

Syntax:

public void clear()

Parameters: This method does not accepts any parameters

Returns: This method does not returns anything.

Below programs illustrate clear() method of LinkedBlockingDeque:

Program 1:

// Java Program Demonstrate clear()
// 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(7855642);
        LBD.add(35658786);
        LBD.add(5278367);
        LBD.add(74381793);

        // before using erase() function
        System.out.println("Linked Blocking Deque: " + LBD);

        LBD.clear();
        // after using erase() function
        System.out.println("Linked Blocking Deque: " + LBD);
    }
}

Output:

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Linked Blocking Deque: []

Program 2:

// Java Program Demonstrate clear()
// method of LinkedBlockingDeque
// when the list contains characters
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 numbers to end of LinkedBlockingDeque
        LBD.add("1");
        LBD.add("2");
        LBD.add("3");
        LBD.add("4");

        // before using erase() function
        System.out.println("Linked Blocking Deque: " + LBD);

        LBD.clear();
        // after using erase() function
        System.out.println("Linked Blocking Deque: " + LBD);
    }
}

Output:

Linked Blocking Deque: [1, 2, 3, 4]
Linked Blocking Deque: []

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/LinkedBlockingDeque.html#clear()