Which valid Java function is equivalent to this Python function?

def greet$()$:

print$("$hi$!")$

void greet$()\{$

System.out.println$("$hi$!")$;

$\}$

String greet$()$:

System.out.println$("$hi$!")$;

void greet$($

System.out.println$("$hi$!")$

greet$()\{$

System.out.println$("$hi$!")$

$\}$