Assignment 8.3: What's Your Rock Star Name? (10pts)

Write a program to generate Rock Star names for you and your friends.
Open a new file in eclipse called RockStar
Place a block comment at the top of the program with your name and the name of the assignment.
Next, welcome the user and prompt for the user's first and last name, as shown below.

Enter your first name: Jennifer
Enter your last name: Parrish
Rock on, Jennifer! 

1. firstLen = length of firstName
   
2. if firstLen > 5 then firstLen = firstLen - 5
   
3. lastLen = length of lastName
   
4. if lastLen > 6 then lastLen = lastLen - 6
   
5. choose title from "Length of First Name" table based on firstLen
   
6. choose Instrument from "Length of Last Name" table based on lastLen
7. firstIntial = first letter of the user's firstName (Hint: call charAt method)
   
8. lastChar = last character of the user's lastName (Hint: call both charAt and length methods)
9. rockStarName = " title " + firstInitial + lastChar + Instrument
   

• Note the use of the " " around the title part of the name below. Those " " are important. Don't forget about escape characters! (Lesson 7).
• Note that you must use else if statements to receive full credit.
  
• When your program is working identically to the output shown below (except the user may give different input), then submit RockStar.java to Canvas
  

Enter your first name: Jennifer
Enter your last name: Parrish
Rock on, Jennifer! 
Your rock star name is "Brutal" JH Guitar

Enter your first name: Geoff
Enter your last name: Chen
Rock on, Geoff! 
Your rock star name is "Rough" GN Banjo

• When your program is working as shown above and meets the specified requirements, submit it to Canvas.
  

• For this programming assignment, we write a basic chatbot program.
• For fun, try having a conversation with an online chatbot here or here.
• Some sources estimate that 25% of customer services will be handled by Chatbots in 2020, vs. 2% in 2017.
• The chatbot we are designing must ask you the following questions:

1. What is your name?
2. What is your phone number?
3. What is your phone plan?
4. How many GB of data this month?

• Just don't give the chatbot your credit card number! 😉

Project Specifications

• Write a chatbot program that interacts with the user as described in the Interaction section below to calculate a phone bill.
• Name the source code file PhoneBot.java and include all your code in this single file.
• Be careful of the spelling, including capitalization, as you will lose points for a misspelled name. Naming is important in programming.
• Interaction: Interact with the user with the following inputs in the order given (and no other input) as follows:
• Name: open the conversation with a welcome and find out the user's name (String).
  
• Reply with a greeting that displays the user's name, like "Thanks for calling RobuCast <user's name>!".
• Phone: find out the user's phone number (String).
  
• Reply with a statement like "Looking up phone number <phone number>...".
• Plan: ask the user for their plan type entered as a basic, gold or unlimited
  
• Reply by spelling out the full plan name, (basic package, gold members, unlimited plan)
  
• Data: request user's data usage in Gigabytes (double).
  
• Reply with a comment that restates the amount of data, such as "Wow, <amount> is a lot of data! You should upgrade."
• Total: display the total bill and say goodbye to <user's name>.
• The parenthesis show the required data types for the input. Make sure to restate the input where indicated by the word "reply" or angle brackets.
• Assume the user enters only valid data.
• The phone bill is based on the phone plan and the number of Gigabytes (GB) of data used per month. Here are the different plans:
• Basic package: the $24.95 per month plan provides 2 GB of data. Additional data are $7.00 per Gigabyte.
• Gold member plan: the $39.95 per month plan provides 5 GB of data. Additional data are $5.00 per Gigabyte.
• Unlimited plan: the $59.95 per month plan provides unlimited data.
• Hint: Assume that the user input will be one word responses at most. Use only input.next() statements in this program (no input.nextLine() statements).
  
• Example Output: The following shows example outputs. Your program prompts and output does not have to exactly match mine.
  
• Your program does need to reply to all input as stated in Interactions above, but you are free to give your chatbot a personality.
  
• Make sure the inputs are in the correct order and that you restate the data entered by the user.
  
• Otherwise, have fun with it!
• When you are finished, upload your PhoneBot.java file to Canvas
  

• Let's write a program, in a file named ValidEmail2.java, to check an email address to see if it is valid.
  
• For the purposes of this assignment, we will use three criteria to determine if an email address is valid:
• The address must end with one of the following extensions: .com, .org or .edu
• The address must not contain a space
• The address must have an @ character contained somewhere in the String
• You will write 3 methods and 3 Javadoc comments. Each method will check each of the above conditions.
• Your first method signature should look like this:

public static boolean validExtension(String address) {

    //method body will go here

}

• The second method signature should look like this:

public static boolean containsSpace(String address) {

    //method body will go here

• The third method signature should look like this:

public static boolean containsAt(String address) {

    //method body will go here

• Hint: Do not alter the starter code, given below, in any way. Your job is only to add to it where indicated.
• Additionally, you are not allowed to use any String methods other than length(), charAt() or substring() in your solution.
• You are also not allowed to use anything we have not covered in class, otherwise you will get no credit for this assignment.
  

• Your task is to write a calculator program that can perform 10 different operations.
• Each of the operations needs to be its own method
• You may optionally write a method to handle Input Validation for input mismatch exceptions (when user enters a String and you expect a numerical input).
  
• Your program will begin by welcoming the user and listing the different operations it can perform (please see sample output below).
• The methods you need to write are as follows:

Assignment 18.2: Getting More Methodical (10 pts)

• Copy and paste the starter code into a new file called More.java
  

• Write the required methods as described by the comments (i.e. you fill in the body of the method).
• Then, run the code when you are finished to see if you wrote the methods correctly.
• Check the test results and make any alterations to your methods as necessary.
  
• When all of the tests pass, upload your code to Canvas.

• Write a program to calculate the total price of purchasing a meal from the Vegan Veganos Mexican food truck, that pops up around San Jose.
• Name your program Tacos.java
  
• For this program, you will need to write 3 methods, as follows:

• Takes in a double parameter for the price of the food.
• Takes in a second double parameter for the percent tip
  
• calls the addTax method to add taxes to the price.
• calls the addTip method to add the tip to the price.
• Displays the price to two decimal places along with the message "With taxes and tip, your total comes to $<price>"
  
• returns nothing

addTax

• Takes in a double parameter for the subtotal for the food.
• Calculates the tax, assuming the tax rate is 9.25% in San Jose
• adds the tax onto the the total price,
  
• returns the update price

addTip

• Takes in a double parameter for the current bill (price of food + tax).
• Takes in a second double parameter for the percent tip
  
• Calculates the tip and adds the tip onto the the total price
  
• returns the updated price
  

Additional Specifications

1. Each method must also have a full Javadoc comment in the style described in class or you will lose 3 points.
2. Important: You should call the formatTotal method inside of main, not the other two methods.
3. The other 2 methods should be called inside of the formatTotal method.
4. Hint: addTip will work very similarly to the addTax method
5. Note: If the user does not select option A, B, or C for the tip, you should automatically assign a tip of 20% (as shown in the second sample output below).
   

• Your program should work identically to the following:

• Alternately:

• Alternately,

• When your program works as shown above, submit it to Canvas.
  

Assignment 19.2: Number of Numbers (10 pts)

• For this assignment you will be working with arrays.
• Open a new Java project called Nums
  
• Prompt a user to enter in the length of the array (the number of numbers).

Assignment 5.2: Applying Integer Division and Modulus (10 pts)

• In Java dividing one integer by another truncates the remainder, which removes the decimal part. To compute the integer remainder, we use the remainder operator (%), also known as the modulus operator.
• The % operator finds the remainder after division of one number by another. The Java expression a % b (pronounced a mod b) returns the remainder of the division of a by b if both numbers are positive. For example:

   3  r 1
2 ) 7
   -6
    1 remainder

• For this assignment we will use both the division and remainder operators to extract single digits form an integer number.
• Write a program that gets three numbers from the user and then sums:
• the hundreds digit of the first number
• with the tens digit of the second number and
• the unit digit of the third number.

• For example, the sum of the diagonal digits of the following three numbers is 3 because the numbers are all 1 on the diagonal as shown by the highlight.

  123
  416
  781
  

• Name the source code file Remainder.java and include all your code in this single file.
• Be careful of the spelling, including capitalization, as you will lose points for a misspelled name. Naming is important in programming.

  Enter first number:  123
  Enter second number: 416
  Enter third number:  781
  Sum of diagonal digits is 3
  

  Enter first number:  123
  Enter second number: 456
  Enter third number:  789
  Sum of diagonal digits is 15
  

  Enter first number:  134
  Enter second number: 56
  Enter third number:  789
  Sum of diagonal digits is 15
  

  Enter first number:  1
  Enter second number: 2
  Enter third number:  3
  Sum of diagonal digits is 3
  

  
  In the above example output, the user entered the values shown in aqua italics (for emphasis) to produce the output. Your program does NOT print the characters in aqua italics, nor does the user input appear in aqua italics.
  

  Notice the fourth example. Entering a 1 is the same as 001. Similarly, entering a 2 is the same as entering 002 and entering a 3 is the same as entering 003. Thus arranging the three numbers in a matrix of rows and columns shows us how the answer was derived.

  001
  002
  003
  

• Ask the user for the three integer numbers, and no other input, as shown in the Example Output.
• Use the division operator (/) and remainder operator (%) to extract digits from the numbers entered by the user.
• Example Output: The input prompts and outputs of the program must look like the following for full credit, including the same order of input and same wording of the output. For the input shown you must get the same output. However, the output must change properly if the inputs are different.
• After displaying the output, exit the program.
• Do not use if-statements, strings or techniques we have not covered.
• Submit Remainder.java to Canvas when your program works as shown.

Assignment 6.2: Catchy Headlines (10 pts)

• With so many competing news sources onf the internet, newspaper and magazine publishers need catchy headlines to attract the attention of readers.
  
• In this assignment, you will write a program to produce suggested headlines based on a topic selected by the user.
• Write a program that produces the following five (5) headlines based on user input of a topic and number:

• The name of the source code file for this program must be Headlines.java (note the capitalization of the H in Headlines).
• Be careful of the spelling, including capitalization, as you will lose points for a misspelled name. Naming is important in programming.
• Ask the user for the following inputs (and no other input) in this order:
• Single word topic
• Integer number between 3 and 20
• Assume the user only enters correct data.
• The words [topic] and [number] (shown in square brackets above for emphasis) must be replaced by the user input.

Mr. Boole is a college professor and you have been invited to his home for tea. During your visit you can discuss anything you want. However, when he asks what you want for tea, you must answer true or false to his questions. In this assignment, you will write a program to simulate asking questions about how you want your tea and then summarize the beverage choice.

Project Specifications

• Complete each of the following Boolean logic problems and code your solutions into the worksheet after the labeling comments. See the Example Runs to verify the correctness of each computation.
  1. Ask for a second teaspoon of sugar only if the first teaspoon of sugar was requested.
  2. If black tea is requested print "Black tea", otherwise print "Green tea".
  3. If milk is requested, print ", with milk". If milk is not requested print ", no milk". Otherwise do not print anything.
  4. If sugar is requested print ", and".
     
  5. If no sugar is requested print " unsweetened". Otherwise print either ("one" or "two") teaspoons of sugar depending on the amount of sugar requested.
• Example Output: The input prompts and outputs of the program must look like the following for full credit, including the same order of input and exact wording of the output. For the input shown you must get the same output. However, the output must change properly if the inputs are different.

1. We have two types of tea, Black and Green.
   Would you like Black tea? true
   Would you like milk in your tea? true
   Would you like sugar? true
   Would you like more sugar? false
   Black tea, with milk, and one teaspoon of sugar.
   

   We have two types of tea, Black and Green.
   Would you like Black tea? true
   Would you like milk in your tea? true
   Would you like sugar? true
   Would you like more sugar? true
   Black tea, with milk, and two teaspoons of sugar.
   

   We have two types of tea, Black and Green.
   Would you like Black tea? false
   Would you like milk in your tea? false
   Would you like sugar? false
   Green tea, no milk, unsweetened.
   

   In the above example outputs, the user entered the values shown in aqua italics (for emphasis) to produce the output. Your program does NOT print the characters in aqua italics, nor does the user input appear in aqua italics.

• Hint: Use the nextBoolean() method for the Scanner.
  
• After displaying the output, exit the program.
• Submit the source code file Tea.java

Assignment 9.3: Fruit Codes - Redux (10 pts)

• 70% of the produce sold in the U.S. contains pesticide residues [1].
• One large study published in the respected medical journal JAMA, found that people who consumed the most organic foods had 25% fewer cancers than those who ate no organic food [2].
• Additionally, foods that are genetically modified tend to be sprayed with large amounts of weed killers [3].
• Regardless of these concerns, most nutrition experts agree that eating fruits and vegetables - either conventional or organic - in large quantities is one of the most important things you can do for your health [4]
  
• Write a program to read in the code printed the sticker on a piece of fruit and print out whether the fruit was grown organically, or conventionally or was genetically modified.
• The program should prompt the user to enter the numeric code on the fruit's sticker, and then read in the user's response as a String.
  
• Codes that are 4 digits long indicate that the fruit has been grown conventionally.
• In this case, print the message: "Your fruit was grown conventionally, with the use of pesticides and chemicals."
  
• Codes that are 5 digits long, and start with an 8, indicate that the fruit has been genetically modified.
• In this case, print the message: "Your fruit was genetically modified."
  
• Codes that are 5 digits long, and start with a 9, indicate that the fruit was grown organically.
• In this case, print the message: "Your fruit was not genetically modified, and was grown according USDA organic standards."
• Codes that do not follow the above format are considered invalid.
  
• Name your file Fruit.java.
  
• The program should work identically to the sample output below.
• Additionally, your code should use exactly one if, two else ifs and one else.
• For full credit, you must use the String methods covered in class in your solution to this assignment.
  

• When your program is working as shown above and meets the specified requirements, submit it to Canvas.
  

Enter the name of a product: bulk bubble gum
Enter the price: $29.95
bulk bubble gum cost is 29 dollars and 95 cents.

Enter the name of a product: the iPhone 8
Enter the price: $295.35
the iPhone 8 cost is 295 dollars and 35 cents.