Java Deque size() Method with Examples

by Online Tutorials Library July 22, 2022

Java Deque size() Method

The size() method of Deque interface is used to return the total number of elements present in the given deque.

Syntax:

Parameter:

The above method requires only one parameter:

The element ‘o’ that needs to be removed.

Specified by:

size in interface Collection<E>

Return:

The above method is used to return the total number of elements present in the given deque.

Example 1

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeresizeExample1 {     public static void main(String[] args) {     Deque<Float> deque = new ArrayDeque<>();      deque.add(55.8f);       deque.add(22.3f);      deque.add(89f);      deque.add(22.3f);      System.out.println(“The final deque is given as : “);     for (Float float1 : deque) {  System.out.println(float1);  }  int size = deque.size();  System.out.println(“The size of the deque is : “+size);     }  }  

Test it Now

Output:

The final deque is given as :   55.8  22.3  89.0  22.3  The size of the deque is : 4

Example 2

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeresizeExample2 {     public static void main(String[] args) {     Deque<String> deque = new ArrayDeque<>();      deque.add(“Computer”);       deque.add(“Programming”);      deque.add(“Language”);    System.out.println(“The final deque is given as : “);     for (String string : deque) {  System.out.println(string);  }  int size = deque.size();  System.out.println(“The size of the deque is : “+size);     }  }  

Test it Now

Output:

The final deque is given as :   Computer  Programming  Language  The size of the deque is : 3

Example 3

  import java.util.ArrayDeque;  import java.util.Deque;  public class JavaDequeresizeExample3 {     public static void main(String[] args) {     Deque<Character> deque = new ArrayDeque<>();      deque.add(‘A’);       deque.add(‘B’);      deque.add(‘C’);      deque.add(‘D’);      deque.add(‘E’);  System.out.println(“The final deque is given as : “+deque);      int size = deque.size();   System.out.println(“The size of the deque is : “+size);     }  }  

Test it Now

Output:

The final deque is given as : [A, B, C, D, E]  The size of the deque is : 5

Next TopicJava Deque

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Java Deque size() Method with Examples

Java Deque size() Method

Syntax:

Parameter:

Specified by:

Return:

Example 1

Example 2

Example 3

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