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Stack addElement(E) method in Java with Example

  • Last Updated : 24 Dec, 2018

The addElement(E) method of Stack Class is used to append the element passed as a parameter to this function at the end of the Stack.

Syntax:

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boolean addElement(E obj)

Here, E is the type of elements maintained 
by this container.

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 True if at least one action of append is performed, else False.



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

Example 1:




// Java code to illustrate boolean addElement()
  
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);
  
        // Appending "GeeksForGeeks" to the Stack
        stack.addElement("GeeksForGeeks");
  
        // Clearing the Stack using clear() and displaying
        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, GeeksForGeeks]

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);
  
        // Appending 100 to the Stack
        stack.addElement(100);
  
        // Clearing the Stack using clear() and displaying
        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]



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