what will happen if Create same Object multiple times in main method and constructor as well

Question

public class Assignment3{
Assignment3()
    {
        Assignment3 obj = new Assignment3();
    }
    
    public static void main(String []args)
    {
        Assignment3 obj = new Assignment3();
        System.out.println("Hello");
    }
}

It's showing This :Exception in thread "main" java.lang.StackOverflowError . What does it mean .