Create a class called Cipher. Make the constructor accept some text and a key. Encrypt the given text using the key.

Use the following cipher:

Take the key and mod it by $26.$ Example: a key of $30$ becomes $4.$

If the character is a letter, shift it by the key, but 'wrap around' the alphabet if necessary.

If the character is not a letter, then shift it by the key but do not wrap.

Check the test cases for example.

Make getters to support the CipherDemo. Also, make two custom Exceptions called UselessKeyException and EmptyPlainText. In your constructor, throw UselessKeyException if the key is divisible by $26$ and throw EmplyPainText if the plain text is zero characters.

Test Case $1$

Enter some text to encrypt

abcENTER

Enter a key

$1$ENTER

Plain text: abc

Cipher text: bcd

Key: $1$

Test Case $2$

Enter some text to encrypt

ENTER

Enter a key

$19$ENTER

Error: Nothing to encrypt!

Test Case $3$

Enter some text to encrypt

ENTER

Enter a key

$23$ENTER

Error: Nothing to encrypt!

Test Case $4$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$1352$ENTER

Error: Key is divisible by $26.$ That's a bad key!

Useless key: $1352$

Test Case $5$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$378$ENTER

Plain text: BitCoin is cool but it has its problems.

Cipher text: PwhQcwb$.$wg$.$qccz$.$pih.wh$.$vog.whg$.$dfcpzsag$<$

Key: $378$

Test Case $6$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$376$ENTER

Plain text: BitCoin is cool but it has its problems.

Cipher text: NufOauz,ue$,$oaax,ngf$,$uf$,$tme,ufe,bdanxqye:

Key: $376$

Test Case $7$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$374$ENTER

Plain text: BitCoin is cool but it has its problems.

Cipher text: LsdMysx$*$sc$*$myyv$*$led$*$sd$*$rkc$*$sdc$*$zbylvowc$8$

Key: $374$

Test Case $8$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$372$ENTER

Plain text: BitCoin is cool but it has its problems.

Cipher text: JqbKwqv$($qa$($kwwt$($jcb$($qb$($pia$($qba$($xzwjtmua$6$

Key: $372$

Test Case $9$

Enter some text to encrypt

BitCoin is cool but it has its problems.ENTER

Enter a key

$370$ENTER

Plain text: BitCoin is cool but it has its problems.

Cipher text: HozIuot&oy&iuur&haz&oz&ngy&ozy&vxuhrksy$4$

Key: $370$

Test Case $10$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$52$ENTER

Error: Key is divisible by $26.$ That's a bad key!

Useless key: $52$

Test Case $11$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$4220$ENTER

Plain text: With computer science, you can work in any industry.

Cipher text: Eqbp$($kwuxcbmz$($akqmvkm$4($gwc$($kiv$($ewzs$($qv$($ivg$($qvlcabzg$6$

Key: $4220$

Test Case $12$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$0$ENTER

Error: Key is divisible by $26.$ That's a bad key!

Useless key: $0$

Test Case $13$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$26$ENTER

Error: Key is divisible by $26.$ That's a bad key!

Useless key: $26$

Test Case $14$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$4221$ENTER

Plain text: With computer science, you can work in any industry.

Cipher text: Frcq$)$lxvydcna$)$blrnwln$5)$hxd$)$ljw$)$fxat$)$rw$)$jwh$)$rwmdbcah$7$

Key: $4221$

Test Case $15$

Enter some text to encrypt

With computer science, you can work in any industry.ENTER

Enter a key

$5021$ENTER

Plain text: With computer science, you can work in any industry.

Cipher text: Zlwk#frpsxwhu#vflhqfh$/$#brx#fdq#zrun#lq#dqb#lqgxvwub$1$

Key: $5021$

Test Case $16$

Enter some text to encrypt

Hello, my secret password is SIMCITY! Don't tell anyone! I've used this for $400$ days.ENTER

Enter a key

$23$ENTER

Plain text: Hello, my secret password is SIMCITY! Don't tell anyone! I've used this for $400$ days.

Cipher text: EbiilC$7$jv$7$pbzobq$7$mxpptloa$7$fp$7$PFJZFQV$87$Alk$>$q$7$qbii$7$xkvlkb$87$F$>$sb$7$rpba$7$qefp$7$clo$7$KGG$7$axvpE

Key: $23$

Test Case $17$

Enter some text to encrypt

XYZENTER

Enter a key

$1$ENTER

Plain text: XYZ

Cipher text: YZA

Key: $1$

Test Case $18$

Enter some text to encrypt

ABCENTER

Enter a key

$1$ENTER

Plain text: ABC

Cipher text: BCD

Key: $1$

Test Case $19$

Enter some text to encrypt

xyzENTER

Enter a key

$1$ENTER

Plain text: xyz

Cipher text: yza

Key: $1$