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.
// 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());    }} |
Output:
Stack: [Welcome, To, Geeks, 4, Geeks] The size is: 5
Program 2: Stack with integer elements.
// 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());    }} |
Output:
Stack: [10, 15, 30, 20, 5] The size is: 5
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