In this program, we will create a Stack Collections with a few elements. Then we will convert created stack into an object array using the toArray() method.

Program/Source Code:

The source code to convert a Stack collection into an Object array is given below. The given program is compiled and executed successfully.

// Java program to convert a Stack collection 
// into Object array

import java.io.*;
import java.util.*;

public class Main {
  public static void main(String[] args) {
    Stack stack = new Stack();

    stack.push(10);
    stack.push(20);
    stack.push(30);
    stack.push(40);

    Object[] arr = stack.toArray();

    System.out.println("Stack: \n" + stack);
    System.out.printf("Array elements:\n%d, %d, %d, %d\n", arr[0], arr[1], arr[2], arr[3]);
  }
}

Output:

Stack: 
[10, 20, 30, 40]
Array elements:
10, 20, 30, 40

Explanation:

In the above program, we imported the "java.io.*" and "java.util.*"packages to use the Stack collection class. Here, we created a class Main. The Main class contains a main() method. The main() method is the entry point for the program.

In the main() method, we created a Stack collection and add elements. Then we converted the stack into an object array using the toArray() method. After that, we printed stack and array elements.