USING JAVA $-17\mathrm{.}9($Address book$)$ Write a program that stores, retrieves, adds, and updates addresses

as shown in Figure $17\mathrm{.}20.$ Use a fixed$-$length string for storing each attribute in the

address. Use random access file for reading and writing an address. Assume that

the size of name, street, city, state, and zip is $32,32,20,2,5$ bytes, respectively.public class MP$5\_$AddressBook $\{$

static RandomAccessFile inout; $//$ reads$/$writes records of $91$ chars each,

$//$or $182$ bytes each at every read$/$write

static int currentRecord $=0$;

public static RandomAccessFile createFile$()$ throws FileNotFoundException $\{$

RandomAccessFile inout $=$ null;

inout $=$ new RandomAccessFile$("$records$.$dat", $"$rw$")$;

return inout;

$\}$

public static int menu$()\{$

int choice $=-1$;

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

do $\{$

System.out.println$("0$: Quit"$)$;

System.out.println$("1$: Add"$)$;

System.out.println$("2$: First"$)$;

System.out.println$("3$: Next"$)$;

System.out.println$("4$: Previous"$)$;

System.out.println$("5$: Last"$)$;

System.out.println$("6$: Update, current"$)$;

System.out.println$("7$: Delete, current"$)$;

System.out.println$("8$: Show All"$)$;

try $\{$

choice $=$ scan.nextInt$()$;

$\}//>$catch any errors in input

catch $($java$.$util.InputMismatchException e$)\{$

System.out.println$("\backslash$t Invalid choice..."$)$;

$\}$

$//>$ if the choice is choice is valid break out of the loop

if $($choice $>=0$ && choice

break;

$\}$

System.out.println$("\backslash$t Invalid choice.."$)$;

$\}$ while $($true$)$;

$//>$return the choice

return choice;

$\}$

public static void add$($Record r$)$ throws IOException $\{$

MP$5\_$AddressBook.inout.seek$($MP$5\_$AddressBook.inout.length$())$;

inout.writeChars$($r$.$getName$())$;

inout.writeChars$($r$.$getStreet$())$;

inout.writeChars$($r$.$getCity$())$;

inout.writeChars$($r$.$getState$())$;

inout.writeChars$($r$.$getZip$())$;

$\}$

public static Record readRecord$($long offset$)$ throws IOException $\{$

MP$5\_$AddressBook.inout.seek$($offset$)$;

char$[]$ name $=$ new char$[$Record$.$SIZE$\_32]$;

$//>$read name

for $($int i $=0$; i $$ name.length; $++$i$)\{$

name$[$i$]=$ inout.readChar$()$;

$\}$

$//>$read street

char$[]$ street $=$ new char$[$Record$.$SIZE$\_32]$;

for $($int i $=0$; i $$ street.length; $++$i$)\{$

street$[$i$]=$ inout.readChar$()$;

$\}$

$//>$read city

char$[]$ city $=$ new char$[$Record$.$SIZE$\_20]$;

for $($int i $=0$; i $$ city.length; $++$i$)\{$

city$[$i$]=$ inout.readChar$()$;

$\}$

$//>$read state

char$[]$ state $=$ new char$[$Record$.$SIZE$\_2]$;

for $($int i $=0$; i $$ state.length; $++$i$)\{$

state$[$i$]=$ inout.readChar$()$;

$\}$

$//>$read zip

char$[]$ zip $=$ new char$[$Record$.$SIZE$\_5]$;

for $($int i $=0$; i $$ zip.length; $++$i$)\{$

zip$[$i$]=$ inout.readChar$()$;

$\}$

Record r $=$ new Record$($

String.copyValueOf$($name$),$

String.copyValueOf$($street$),$

String.copyValueOf$($city$),$

String.copyValueOf$($state$),$

String.copyValueOf$($zip$)$

$)$;

return r;

$\}$

public static Record first$()$ throws IOException $\{$

return readRecord$(0)$;

$\}$

public static Record getRecordFromUser$()\{$

Record r $=$ new Record$()$;

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

System.out.print$("\backslash$tname: $")$;

r$.$setName$($scan$.$nextLine$())$;

System.out.print$("\backslash$tstreet:$")$;

r$.$setStreet$($scan$.$nextLine$())$;

System.out.print$("\backslash$tcity:$")$;

r$.$setCity$($scan$.$nextLine$())$;

System.out.print$("\backslash$tstate:$")$;

r$.$setState$($scan$.$nextLine$())$;

System.out.print$("\backslash$tzip:$")$;

r$.$setZip$($scan$.$nextLine$())$;

return r;

$\}$

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

try $\{$

MP$5\_$AddressBook.inout $=$ MP$5\_$AddressBook.createFile$()$;

$\}$ catch $($FileNotFoundException e$)\{$

System.err.println$("$Exiting$..."+$ e$)$;

return;

$\}$

try $\{$

System.out.println$("$ the size of the file records.dat is : $"+$ MP$5\_$AddressBook.inout.length$()+"$ bytes $")$;

int choice $=-1$;

Record r $=$ null;

while $(($choice $=$ menu$())!=0)\{$

switch $($choice$)\{$

case $1$:

r $=$ getRecordFromUser$()$;

add$($r$)$;

System.out.println$($r$)$;

break;

case $2$:

currentRecord $=0$;

r $=$ first$()$;

Syste