What is the output of this code?

public class A$\{$

private String str;

A$($String str$)\{$

$\}$

this.str $=$ str;

public void getInfo$()\{$

System.out.println$($str$)$

$\}$

$\}$

public class MainClass$\{$

public static void main$($String $[]$ args$)\{$ A x $=$ new A$("$hello$")$;

System.out.println$($x$.$str$)$;

x$.$getInfo$()$;

$\}$

$\}$