public class Greeter

$\{$

public String greet$()$

$\{$

return $"$Hi$"$;

$\}$

public String greet$($String who$)$

$\{$

return "Hello $"+$ who;

$\}$

public static void main$($String$[]$ args$)$

$\{$

Greeter g$1=$ new Greeter$()$;

System.out.println$($g$1.$greet$("$Sam$"))$;

Greeter g$2=$ new MeanGreeter$()$;

System.out.println$($g$2.$greet$("$Nimish$"))$;

$\}$

$\}$

class MeanGreeter extends Greeter

$\{$

public String greet$()$

$\{$

return $"$Go away";

$\}$

$\}$