$4\mathrm{.}2\mathrm{.}1$: Write a method that changes a y Jane". import java.util.Scanner;

public class Names

$\{$

$/**$

Changes a name so that the last name comes first.

If name has no spaces, it is returned without change.

@param name a name such as "Mary Jane Lee"

@return the reversed name, such as "Lee, Mary Jane".

$*/$

public static String lastNameFirst$($String name$)$

$\{$

lastName $=$

$\}$

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

$\{$

Scanner in $=$ new Scanner$($System$.$in$)$;

String name $=$ in$.$nextLine$()$;

System.out.println$($lastNameFirst$($name$))$;

$\}$

$\}$