Unit 4  Objects && ArrayList

• Objects in Java
• Bank Assignment
• Student Class
• ClassRoster 
• PlayListProject 

Unit 5 : Objects Continued

• Unit Goal : What structures in Java exist that can best support advanced relationships between classes?
  • Rectangle, Triangle
  • Circle?
  • Polygon , Shape ?
• Superclasses are great I
• Superclasses are Great II
• What is ‘inherited’ by subclasses?
• The Circle
• Account Assignment
• Bank Class

Assignment ): Tutorial 4-2 Gum Drop Fish Assignment will be graded (2 points) from packet #13 will be graded.  Download the GumdropBigFish world 

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Assignment 1 )   Miles Per Gallon: Create a world in which the

•  Create 3 variables :  miles, gallons ,MPG  
  •  2 of the variables  store the return value of a function
    • The user is asked for the number of gallons  of fuel his or her car can hold. Use the return value of the ask use for a number function as shown below.
    • Do the same thing for the the number of miles  that he or she can drive on a full tank. Use ask a user function to set the value of the miles variable.
• a third variable called MPG.   This one will store the result of some math and will hold the car’s miles-per-gallon (MPG). Calculate the MPG with the following formula
  
  MPG = miles/gallons

  1	MPG = miles/gallons

• At the end , your character should say the value of the   mpg , as shown below.

How to use “what as a string”

 

 

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Assignment  3) Fahrenheit to Centigrade :

First, watch the animated gifs on this web page that explain how to use math in Alice

 

• Create a variable called degreesFahrenheit  .
• Store the return value of the ask_user to enter a number function
  • You should ask them for the degrees in Fahrenheit
• Create a variable called  degreesCentigrade
• Use the following formula to convert the degreesFahrenheit   to Centigrade using the following formula
  
  degreesCentigrade = (5/9) * (degreesFahrenheit − 32)

  1	degreesCentigrade = (5/9) * (degreesFahrenheit − 32)

• use a character from thePeople collection to say the centigrade temperature.
• Don’t forget that you can’t say numbers, you must use what as a string

 

 

 

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Assignment 4) Modification of MPG

reopen the miles per gallon project

• if the MPG variable <  20
  • say “What a Gas Guzzler”
• else
  • say ” Your car is not a gas guzzler”

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Assignment 5) Modification of Fahrenheit to Centigrade

reopen the Fahrenheit to Centigrade project and add

• if the degreesCentigrade  variable <30
  • say “It’s Very cold
• else
  • say ” It is warm outside”

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Assignment 6) Circle’s Area and Circumference: Create a world with your choice of person from the Peoplecollection. When you play the world, it should

• ask the user for the radius of a circle. (This value should be stored in a variable ).
• The person should then say the area and the circumference of the circle.( Links for the circumference formula , area of a circle)
• (For an extra point do the same thing with a “Sphere“. Ask the user for the radius and calculate the surface area and the volume.

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Assignment 8 

Roman Numeral translator

Here’s a gif showing partial code and what the finished project should look like
Objective : to let the user type in a number between 1 and 10 and then have a character “translate” that into Roman Numerals ( I, II, III, IV, V, VI, VII, VIII, IX, X)

• Ask the user for a number and store the return value into a variable called numberToTranslate
• if the user enters a number greater than 10 then  OR less than 1 , have your character say, use either a or b “Only enter numbers between 1 and 10”

 

 

• use a series of “if/else tests to translate the number and say the write translation for each number between 1 and 10
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We are going to use the roman Numeral Translator file again, so it’s important that you don’t lose the file and give it a good name that you can easily recognize in the future.

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Assignment 7-extra credit ). Look up the formulas for the volume and surface area of a cylinder . Ask the user for the height of the cylinder and the radius, which should be stored in variables. Then calculate the surface area and volume of the cylinder . See if there is a cylinder shape in the gallery to use as a visual aid.

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Assignment 8 ) Open Assignment

Create an Alice world that

• uses a variable
• uses a ask_user world function
• uses a comment
• uses an if/else
• uses a math expression with more than one operation (ie addition and also multiplication or multiplication and also subtraction)
• tells a story

 

Unit 4  Objects && ArrayList

• Objects in Java
• Bank Assignment
• Student Class
• ClassRoster (   Due EOD Sunday )
• PlayListProject  ( Due EOD Thursday )
• p.310 – 319 Multiple choice Friday at start of class

 

Part I

import java.util.ArrayList

• ArrayListDemo Code
  
• ArrayList Excercises 1