Java Deque addLast() Method with Examples

by Online Tutorials Library July 22, 2022

Java Deque addLast() Method

The addLast() method of Java Deque Interface is used to insert the specified element at the end of the deque.

Syntax:

Parameter:

The above method consists of only one parameter:

The element ‘e’ that needs to be inserted.

Return:

Throw:

IllegalStateException– If the elements cannot be added at the time due to capacity restriction.

ClassCastException– If the class of the specified element avoids it from being added to the deque.

NullPointerException– If the specified element is a null and the deque does not allow the null elements.

IllegalArgumentException– If some of the property of the given element avoids it from being added to the deque.

Example 1

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeaddLastExample1 {    public static void main(String[] args) {  Deque<Integer> deque = new ArrayDeque<>();  deque.addLast(44);  deque.addLast(33);  deque.addLast(22);  deque.addLast(11);      System.out.println(“The elements are adding at the front of the deque : “+deque);      }  }  

Test it Now

Output:

The elements are adding at the front of the deque : [44, 33, 22, 11]

Example 2

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeaddLastExample2 {     public static void main(String[] args) {     Deque<String> deque = new ArrayDeque<>();  deque.addLast(“FAT”);  deque.addLast(“CAO”);  deque.addLast (“JAVA”);  deque.addLast (“DBMS”);     System.out.println(“The subjects are given as : “+deque);     }  }  

Test it Now

Output:

The subjects are given as : [FAT, CAO, JAVA, DBMS]

Example 3

  import java.util.ArrayDeque;  import java.util.Deque;  import java.util.Scanner;  public class JavaDequeaddLastExample3 {      public static void main(String[] args) {       System.out.print(“Enter the number of times you want to enter the names : “);       Scanner scanner = new Scanner(System.in);       int n = scanner.nextInt();             Deque<String> deque = new ArrayDeque<String>();       System.out.println(“The names are : “);       for (int i = 0; i < n; i++) {        String name = scanner.next();        deque.addLast(name);        }       System.out.println(“The final deque is : “+deque);         }      }  

Output:

Enter the number of times you want to enter the names : 4  The names are :   Ashu  Hitesh  Jasmeet  Isha  The final deque is : [Ashu, Hitesh, Jasmeet, Isha]

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Java Deque addLast() Method with Examples

Java Deque addLast() Method

Syntax:

Parameter:

Return:

Throw:

Example 1

Example 2

Example 3

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