Help me figure out the StackTraceElement[]

Good time of day. Help us understand the essence of StackTrace.

The training material provides an explanation of

The Java machine records all function calls. She has a special collection for this-a stack. When one function calls another, the Java machine puts a new StackTraceElement on this stack. When the function terminates, this element is removed from the stack. Thus, this stack always stores up-to-date information about the current state "function call stack"

The following is an example of

 public static void main(String[] args)
  {
    method1();
  }

  public static void method1()
  {
    method2();
  }

  public static void method2()
  {
    method3();
  }

  public static void method3()
  {
    StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
    for (StackTraceElement element : stackTraceElements)
    {
       System.out.println(element.getMethodName());
    }
  }

As a result of which we get

getStackTrace
method3
method2
method1
main

If I understand everything correctly, then the construction

StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();

It works as follows:

//Cоздаём переменную типа StackTraceElement[]
StackTraceElement[] stackTraceElements 

//Присваеваем ей ссылку на текущий поток и заносим в массив специальные элементы StackTrace
Thread.currentThread().getStackTrace()

Question #1: how does this array StackTraceElement[] contain all the information about the called methods, if it says that after the method is executed, the information is removed from the stack?

Question #2: In one of the tasks, you are asked to return the name of the method that uses it calls

 public static void main(String[] args) throws Exception
{
    method1();
}

public static String method1()
{
    method2();
    return Thread.currentThread().getStackTrace()[2].getMethodName();


}

public static String method2()
{
    method3();
    return Thread.currentThread().getStackTrace()[2].getMethodName();
}

public static String method3()
{
    method4();
    return Thread.currentThread().getStackTrace()[2].getMethodName();
}

public static String method4()
{
    method5();
    return Thread.currentThread().getStackTrace()[2].getMethodName();
}

public static String method5()
{
    return Thread.currentThread().getStackTrace()[2].getMethodName();
}

How does the {[9] construction work?]}

return Thread.currentThread().getStackTrace()[2].getMethodName();

If we didn't create StackTraceElement[]. Does this mean that it is implicitly created by the JVM when the program is executed?