PLEASE HELP

$4\mathrm{.}9\mathrm{.}1$: Complete the user interface.

Complete the following program to implement the user interface of the preceding exercise. For simplicity, only the units cm$,$ m$,$ and in are supported.

Hint: The value of factor$1$ or factor$2$ should be the conversion factor from the selected unit to cm$.$ Ex: If the selected unit is in$,$ factor$1$ is $2\mathrm{.}54$ because $1$ in $=2\mathrm{.}54$ cm$.$

$!!!$USE THIS CODE FORMAT PLEASE!!!!

import java.util.Scanner;

public class UnitConverter

$\{$

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

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

boolean done $=$ false;

double factor$1=0$;

double factor$2=0$;

String unit$1=""$;

String unit$2=""$;

while $(!$done$)$

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boolean getSecond $=$ true;

String command $=$ in$.$next$()$;

System.out.println$("$From unit $($in$,$ cm$,$ m$,$ again, quit$)$: $"+$ command$)$;

if $($command$.$equals$("$in$"))$

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factor$1=2\mathrm{.}54$; $//$ Convert to cm

unit$1=$ command;

$\}$

else if $($command$.$equals$("$cm$"))$

$\{$

$/*$ Your code goes here $*/$

$\}$

else if $($command$.$equals$("$m$"))$

$\{$

$/*$ Your code goes here $*/$

$\}$

else if $($command$.$equals$("$again$"))$

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getSecond $=$ false;

$\}$

else if $($command$.$equals$("$quit$"))$

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done $=$ true;

getSecond $=$ false;

$\}$

else

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System.out.println$("$Sorry$,$ unknown unit.

$")$;

getSecond $=$ false;

$\}$

if $($getSecond$)//$ If 'from' unit is valid, get $\text{'}$to$\text{'}$ unit

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unit$2=$ in$.$next$()$;

System.out.println$("$To unit: $"+$ unit$2)$;

if $($unit$2.$equals$("$in$"))$

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factor$2=2\mathrm{.}54$; $//$ Convert from cm

$\}$

else if $/*$ Your code goes here $*/$

else if $/*$ Your code goes here $*/$

else $/*$ Your code goes here $*/$

$\}$

if $(/*$ Your code goes here $*/)$

$\{$

double value $=$ in$.$nextDouble$()$;

double result $=$ value $*$ factor$1/$ factor$2$;

System.out.println$($value $+""+$ unit$1+"="+$ result $+""+$ unit$2+"$

$")$;

$\}$

$\}$

$\}$

$\}$