ArrayDeque addLast() Method in Java
Last Updated :
20 Sep, 2022
The java.util.ArrayDeque.addLast(Object element) method in Java is used to insert a specific element at the end of this deque. It is similar to the add() method in Java. Syntax:
Array_Deque.addLast(Object element)
Parameters: The parameter element is of the type ArrayDeque and refers to the element to be added. Return Value: The function does not return any value. Exceptions: The method throws NullPointerException if the passed parameter is NULL.
The Time Complexity of this addLast(Object element) is O(1) i.e Constant.
Below programs illustrate the Java.util.ArrayDeque.addLast() method:
Program 1: Adding Integers to the Deque.
Java
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( "ArrayDeque: " + de_que);
de_que.addLast( 40 );
de_que.addLast( 50 );
de_que.addLast( 60 );
de_que.addLast( 70 );
System.out.println( "ArrayDeque_end_addition: " + de_que);
}
}
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Output:
ArrayDeque: [10, 15, 30, 20, 5]
ArrayDeque_end_addition: [10, 15, 30, 20, 5, 40, 50, 60, 70]
Program 2: Adding String to the Deque.
Java
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( "4" );
de_que.add( "Geeks" );
System.out.println( "ArrayDeque: " + de_que);
de_que.addLast( "GFG" );
de_que.addLast( "World" );
de_que.addLast( "Hello" );
System.out.println( "ArrayDeque_end_addition: " + de_que);
}
}
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Output:
ArrayDeque: [Welcome, To, Geeks, 4, Geeks]
ArrayDeque_end_addition: [Welcome, To, Geeks, 4, Geeks, GFG, World, Hello]
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