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Stack capacity() method in Java with Example

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  • Last Updated : 24 Dec, 2018
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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

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