Stack capacity() method in Java with Example

The capacity() method of Stack Class is used to get the capacity of this Stack. That is the number of elements present in this stack container.

Syntax:

public int capacity()

Parameters: This function accepts a parameter E obj which is the object to be added at the end of the Stack.

Return Value: The method returns integer value which is the capacity of the Stack

Below program illustrate the Java.util.Stack.capacity() method:

Example 1:

// Java code to illustrate boolean capacity()

import java.util.*;
import java.util.ArrayList;

public class GFG {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<String> stack = new Stack<String>();

        // Use add() method to add elements in the Stack
        stack.add("Geeks");
        stack.add("for");
        stack.add("Geeks");
        stack.add("10");
        stack.add("20");

        // Displaying the Stack
        System.out.println("The Stack is: " + stack);

        // checking capacity
        System.out.println("Capacity: "
                           + stack.capacity());
    }
}

Output:

The Stack is: [Geeks, for, Geeks, 10, 20]
Capacity: 10

Example 2:

// Java code to illustrate
// boolean add(Object element)

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 in the Stack
        stack.add(10);
        stack.add(20);
        stack.add(30);
        stack.add(40);
        stack.add(50);

        // Displaying the Stack
        System.out.println("The Stack is: " + stack);

        // checking capacity
        System.out.println("Capacity: "
                           + stack.capacity());
    }
}

Output:

The Stack is: [10, 20, 30, 40, 50]
Capacity: 10