Stack size() method in Java with Example

The Java.util.Stack.size() method in Java is used to get the size of the Stack or the number of elements present in the Stack.

Syntax:

Stack.size()

Parameters: The method does not take any parameter.

Return Value: The method returns the size or the number of elements present in the Stack.

Below programs illustrate the Java.util.Stack.size() method:

Program 1: Stack with string elements.

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// Java code to illustrate size()
import java.util.*;
  
public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<String> stack = new Stack<String>();
  
        // Use add() method to add elements into the Stack
        stack.add("Welcome");
        stack.add("To");
        stack.add("Geeks");
        stack.add("4");
        stack.add("Geeks");
  
        // Displaying the Stack
        System.out.println("Stack: " + stack);
  
        // Displaying the size of Stack
        System.out.println("The size is: " + stack.size());
    }
}

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Output:

Stack: [Welcome, To, Geeks, 4, Geeks]
The size is: 5

Program 2: Stack with integer elements.

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// Java code to illustrate size()
import java.util.*;
  
public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<Integer> stack = new Stack<Integer>();
  
        // Use add() method to add elements into the Stack
        stack.add(10);
        stack.add(15);
        stack.add(30);
        stack.add(20);
        stack.add(5);
  
        // Displaying the Stack
        System.out.println("Stack: " + stack);
  
        // Displaying the size of Stack
        System.out.println("The size is: " + stack.size());
    }
}

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Output:

Stack: [10, 15, 30, 20, 5]
The size is: 5


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