Java Deque offer() Method with Examples

by Online Tutorials Library July 22, 2022

Java Deque offer() Method

The offer() method of Java Deque Interface inserts the given element into the queue which is represented by the particular deque.

Specified by:

offer in interface Queue<E>

Syntax:

Parameter:

The above method requires only one parameter :

The element ‘e’ that needs to be added.

Return:

The above method is used to return a Boolean value, i.e., true if the element is added to the queue. Otherwise, returns false.

Throw:

ClassCastException– If the class for the given element avoids it from being added to the deque.

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

IlleagalArgumentException– If some properties of the specified element prevents it from being added to the deque.

Example 1

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeofferExample1 {     public static void main(String[] args) {  Deque<String> deque = new ArrayDeque<>();    deque.offer(“Tina”);    deque.offer(“Shyam”);    deque.offer(“Isha”);    deque.offer(“Falguni”);  System.out.println(“The final deque is given as : “);         for (String string : deque) {  System.out.println(string);  }        }  }  

Test it Now

Output:

The final deque is given as :   Tina  Shyam  Isha  Falguni

Example 2

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeofferExample2 {     public static void main(String[] args) {  Deque<Integer> deque = new ArrayDeque<>();    deque.offer(34);    deque.offer(43);    deque.offer(22);    deque.offer(55);  System.out.println(“The final deque is given as : “);        for (Integer integer : deque) {  System.out.println(integer);    }   }        }  

Test it Now

Output:

The final deque is given as : [34, 43, 22, 55]  34  43  22  55

Example 3

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeofferExample3 {     public static void main(String[] args) {  Deque<Character> deque = new ArrayDeque<>();    deque.offer(‘H’);    deque.offer(‘E’);    deque.offer(‘L’);    deque.offer(‘L’);    deque.offer(‘O’);  System.out.println(“The final deque is given as : “);      for (Character character : deque) {  System.out.println(character);      }       }    }     

Test it Now

Output:

The final deque is given as :   H  E  L  L  O

Next TopicJava Deque

add()addAll()addfirst()addlast()contains()descendingiterator()element()getfirst()getlast()iterator java deque java tutorial methods offer()offerfirst()offerlast()peek()peekfirst()peeklast()poll()pollfirst()polllast()

Java Deque offer() Method with Examples

Java Deque offer() Method

Specified by:

Syntax:

Parameter:

Return:

Throw:

Example 1

Example 2

Example 3

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Java Abstract Keyword

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