Open In App

Stack addAll(int, Collection) method in Java with Example

Improve
Improve
Like Article
Like
Save
Share
Report

The addAll(int, Collection) method of Stack Class is used to append all of the elements from the collection passed as a parameter to this function at a specific index or position of a Stack.

Syntax:

boolean addAll(int index, Collection C)

Parameters: This function accepts two parameters as shown in the above syntax and are described below.

  • index: This parameter is of integer datatype and specifies the position in the Stack starting from where the elements from the container will be inserted.
  • C: It is a collection of ArrayList. It is the collection whose elements are needed to be appended.

Return Value: The method returns True if at least one action of append is performed, else False.

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

Example 1:




// Java code to illustrate boolean addAll()
  
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");
  
        // A collection is created
        Collection<String> c = new ArrayList<String>();
        c.add("A");
        c.add("Computer");
        c.add("Portal");
        c.add("for");
        c.add("Geeks");
  
        // Displaying the Stack
        System.out.println("The Stack is: " + stack);
  
        // Appending the collection to the Stack
        stack.addAll(1, c);
  
        // 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, A, Computer, Portal, for, Geeks, for, Geeks, 10, 20]

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);
  
        // A collection is created
        Collection<Integer> c = new ArrayList<Integer>();
        c.add(1);
        c.add(2);
        c.add(3);
  
        // Displaying the Stack
        System.out.println("The Stack is: " + stack);
  
        // Appending the collection to the Stack
        stack.addAll(2, c);
  
        // 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, 1, 2, 3, 30, 40, 50]


Last Updated : 24 Dec, 2018
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads