The size() method is used to count the number of elements in a given deque.
Package: java.util
Java Platform: Java SE 8
Syntax:
size()
Return Value:
the number of elements in this deque
Return Value Type: int
Pictorial Presentation
Example: Java ArrayDeque Class: size() Method
import java.util.ArrayDeque;
import java.util.Deque;
public class Main {
public static void main(String[] args) {
// Create an array deque
Deque<Integer> deque = new ArrayDeque<Integer>(8);
// Use add() method to add elements in the deque
deque.add(100);
deque.add(200);
deque.add(150);
deque.add(95);
deque.add(200);
// Print all the elements of the original deque
System.out.println("Elements of the original deque:");
for (Integer number : deque) {
System.out.println("Number = " + number);
}
// size() will print the size of this deque
int deque_size = deque.size();
System.out.println("Size of deque = " + deque_size);
}
}
Output:
Elements of the original deque: Number = 100 Number = 200 Number = 150 Number = 95 Number = 200 Size of deque = 5
Java Code Editor:
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