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
