Stack add(Object) method in Java with Example

The add(Object) method of Stack Class appends the specified element to the end of this Stack.

Syntax:

boolean add(Object element)

Parameters: This function accepts a single parameter element as shown in the above syntax. The element specified by this parameter is appended to end of the Stack.

Return Value: This method returns True after successful execution, else False.

Below program illustrates the working of java.util.Stack.add(Object element) method:

Example 1:

// 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<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");

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

        // Adding new elements to the end
        stack.add("Last");
        stack.add("Element");

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

Output:

The Stack is: [Geeks, for, Geeks, 10, 20]
The new Stack is: [Geeks, for, Geeks, 10, 20, Last, Element]

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);

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

        // Adding new elements to the end
        stack.add(100);
        stack.add(200);

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

Output:

The Stack is: [10, 20, 30, 40, 50]
The new Stack is: [10, 20, 30, 40, 50, 100, 200]