LinkedBlockingDeque clear() method in Java

Last Updated : 14 Sep, 2018

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()

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