Create a basic chat bot without using a scanner. All input will come from the command line.

If the user entered nothing at the command line, show Nothing to say?

If the user entered some variation of how are you today? show Fine, but could use some more power. As long as the input has the word "are" before the word "you", print this message. Make your program smart enough to accept variations of these words $($see output$).$

If the user entered some variation of what is your favorite something? Display something? I$\text{'}$m only interested in transistors.

In all other cases, show I didn't understand that. I can't pass all the test cases with the codes that I have.

Test Case $1$

Passed!

Nothing to say?

Test Case $2$

Passed!

Command Line arguments:

how are you today?

Fine, but could use some more power.

Test Case $3$

Passed!

Command Line arguments:

how ARE yOU today?!?!

Fine, but could use some more power.

Test Case $4$

Passed!

Command Line arguments:

You are not funny.

I didn't understand that.

Test Case $5$

Passed!

Command Line arguments:

YOU ARE NOT FUNNY!

I didn't understand that.

Test Case $6$

Passed!

Command Line arguments:

how are we able to make you happy?

Fine, but could use some more power.

Test Case $7$

Passed!

Command Line arguments:

how are$93$ yYOu today

Fine, but could use some more power.

Test Case $8$

Passed!

Command Line arguments:

how are how are we doing and you?

Fine, but could use some more power.

Test Case $9$

Failed

Show what's missing

Command Line arguments:

what is your favorite cookie?

I didn't understand that.

Test Case $10$

Passed!

Command Line arguments:

do you like cars?

I didn't understand that.

Test Case $11$

Failed

Show what's missing

Command Line arguments:

what is your favorite car?

I didn't understand that.

Test Case $12$

Failed

Show what's missing

Command Line arguments:

what favorite food?

I didn't understand that.

Test Case $13$

Failed

Show what's missing

Command Line arguments:

what do I have to say to FIGURE OUT your FAVORITE$3$ soda?

I didn't understand that.

Test Case $14$

Passed!

Command Line arguments:

i give up$.$

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

$\{$

$//$ checking whether user entered anything in command line or not

if$($args$.$length $==0)$

System.out.println$("$Nothing to say?"$)$;

else

$\{$

String input $=""$;

for$($String data: args$)$

input $=$ input $+$ data $+""$; $//$ appending all words of command line in a string

input $=$ input.toLowerCase$()$; $//$ changing whole string in lowercase $,$ to make it case$-$insensitive

int indexOfAre $=$ input.indexOf$("$are$")$; $//$ getting the index of word "are"

int indexOfYou $=$ input.indexOf$("$you$")$; $//$ getting the index of word "you"

int indexOfFavourite $=$ input.indexOf$("$favourite$")$;$//$ getting the index of word "favourite"

$//$checking if are is present before you or not $($ if true then index of are is smaller than index of you$)$

if$($ indexOfAre $!=-1$ && indexOfYou $!=-1$ && indexOfAre $<$ indexOfYou$)$

System.out.println$("$Fine$,$ but could use some more power."$)$;

$//$ if string contains word favourite or not

else if$($indexOfFavourite $!=-1)$

$\{$

$//$ getting the index of space after the word favourite

int spaceIndex $=$ input.indexOf$("",$ indexOfFavourite$)$;

$//$ getting the index of question mark $(?)$

int qmIndex $=$ input.indexOf$("?",$ spaceIndex$)$;

$//$ getting string between space and question mark after the word favourite

String str $=$ input.substring$($spaceIndex$+1,$qmIndex$)$;

System.out.println$($str$.$trim$()+"?$ I$\text{'}$m only interested in transistors."$)$;

$\}$

else

System.out.println$("$I didn't understand that."$)$;

$\}$

$\}$

$\}$