Java Stack - setElementAt() Method

The java.util.Stack.setElementAt() method is used to set the component at the specified index of the stack to be the specified object. The previous component at that position is discarded.

Syntax

public void setElementAt(E obj, int index)

Here, E is the type of element maintained by the container.

Parameters

Return Value

void type.

Exception

Throws IndexOutOfBoundsException, if the index is out of range.

Example:

In the example below, the java.util.Stack.setElementAt() method is used to set the element at the specified index of the stack to be the specified element.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a stack
    Stack<Integer> MyStack = new Stack<Integer>();

    //populating stack
    MyStack.push(10);
    MyStack.push(20);
    MyStack.push(30);
    MyStack.push(40);
    MyStack.push(50);

    System.out.println("Before method call, MyStack contains: " + MyStack);
    MyStack.setElementAt(1000, 1);
    System.out.println("After method call, MyStack contains: " + MyStack);    
  }
}

The output of the above code will be:

Before method call, MyStack contains: [10, 20, 30, 40, 50]
After method call, MyStack contains: [10, 1000, 30, 40, 50]