The Java.util.ArrayDeque.size() method in Java is used to get the size of the Deque or the number of elements present in the Deque.
Syntax:
Array_Deque.size()
Parameters: The method does not take any parameter.
Return Value: The method returns the size or the number of elements present in the Deque.
Below programs illustrate the Java.util.ArrayDeque.size() method:
Program 1: Adding String elements into the Deque.
// Java code to illustrate size() import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<String> de_que = new ArrayDeque<String>();
// Use add() method to add elements into the Deque
de_que.add( "Welcome" );
de_que.add( "To" );
de_que.add( "Geeks" );
de_que.add( "4" );
de_que.add( "Geeks" );
// Displaying the ArrayDeque
System.out.println( "ArrayDeque: " + de_que);
// Displaying the size of Deque
System.out.println( "The size is: " + de_que.size());
}
} |
Output:
ArrayDeque: [Welcome, To, Geeks, 4, Geeks] The size is: 5
Program 2: Adding Integer elements into the Deque.
// Java code to illustrate clear() import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<Integer> de_que = new ArrayDeque<Integer>();
// Use add() method to add elements into the Deque
de_que.add( 10 );
de_que.add( 15 );
de_que.add( 30 );
// Displaying the ArrayDeque
System.out.println( "ArrayDeque: " + de_que);
// Displaying the size of Deque
System.out.println( "The size is: " + de_que.size());
}
} |
Output:
ArrayDeque: [10, 15, 30] The size is: 3