ArrayDeque pop() Method in Java
Last Updated :
10 Dec, 2018
The Java.util.ArrayDeque.pop() method in Java is used to pop an element from the deque. The element is popped from the top of the deque and is removed from the same.
Syntax:
Array_Deque.pop()
Parameters: The method does not take any parameters.
Return Value: This method returns the element present at the front of the Deque.
Exceptions: The method throws NoSuchElementException is thrown if the deque is empty.
Below programs illustrate the Java.util.ArrayDeque.pop() method:
Program 1:
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
Deque<String> de_que = new ArrayDeque<String>();
de_que.add( "Welcome" );
de_que.add( "To" );
de_que.add( "Geeks" );
de_que.add( "For" );
de_que.add( "Geeks" );
System.out.println( "Initial ArrayDeque: " + de_que);
System.out.println( "Popped element: " + de_que.pop());
System.out.println( "Popped element: " + de_que.pop());
System.out.println( "Deque after operation "
+ de_que);
}
}
|
Output:
Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
Popped element: Welcome
Popped element: To
Deque after operation [Geeks, For, Geeks]
Program 2:
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
Deque<Integer> de_que = new ArrayDeque<Integer>();
de_que.add( 10 );
de_que.add( 15 );
de_que.add( 30 );
de_que.add( 20 );
de_que.add( 5 );
System.out.println( "Initial ArrayDeque: " + de_que);
System.out.println( "Popped element: " + de_que.pop());
System.out.println( "Popped element: " + de_que.pop());
System.out.println( "Deque after operation "
+ de_que);
}
}
|
Output:
Initial ArrayDeque: [10, 15, 30, 20, 5]
Popped element: 10
Popped element: 15
Deque after operation [30, 20, 5]
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