CS46A Spring 18

4A

Create a class SodaCan that represents a soda can. Provide Javadoc comments for the class, every public method, every parameter, and every return value.

A SodaCan has a radius and height measured in inches. It also has a current contents which is the number of fluid ounces currently in the can.

Provide 2 constructors:

• A no-argument constructor (also called a default constructor)
  Sets the radius to 1.2109 and height to 4.704. These are measured in inches
• A constructor that accepts the radius and height as arguments.

When a SodaCan is created, it is filled to capacity, that is, the contents is the volume of the can expressed in fluid ounces.

In the constructor, in addition to initializing the height and radius, you also need to calculate the capacity and initialize the contents to that value.

To calculate the capacity

• First calculate the capacity in cubic inches. "Capacity" is just "volume", so calculate the volume of a cylinder of the given height and radius (formula given here.) For the value of PI , use the constant Math.PI in the Math class.
• Then convert from cubic inches to fluid ounces using this formula (1 cubic inch = 0.554112554 fluid ounces). Be sure to set the value of contents in each constructor.

Provide these accessor methods:

• public double getRadius() gets the radius of the SodaCan
• public double getHeight() gets the height of the SodaCan

Also provide these methods (the first is a mutator and the second is an accessor):

• public void drink(double fluid_ ounces) simulates drinking from it by subtracting fluid_ounces from the contents.
• public double getContents() gets the fl. oz. of soda remaining in the SodaCan.

Use the constants that are defined for you in the starter class

For the draft , provide the three instance variables, the no-argument constructor, the getHeight(), and getRadius() methods. Remember that instance variables should be private.

4A draft:
4A final:

4B

Write an application InputApplication. (An application has a main method.)

Create a Scanner object and do the following..

• Ask the user to enter a their favorite dessert using this exact prompt: System.out.print("Enter a your favorite dessert: "); (The dessert might be more than one word.)
• Use Scanner's nextLine method to get the word
• Print the last letter of the input
• Ask the user to enter a double using this exact prompt: System.out.print("Enter a double: ");
• Use Scanner's nextDouble method to get the double
• Now ask the user to enter a integer using this prompt: System.out.print("Enter an integer: ");
• Use Scanner's nextInt method to get the integer
• Calculate the product of the double and the integer (Product means multiply)
• Print the product on a new line.
• Print the integer portion of the product on a new line.(Think cast)

Only create one Scanner.

For the draft, create the Scanner and do the first three steps.

4B draft:
4B final:

4C

Write a class StringManipulation to create a Scanner and do the following:

• Ask the user to enter their full name using this exact prompt: System.out.print("Enter your full name: "); This may be several words
• Print the first letter of the name. Use the substring method.
• Print just their first name. See below for some help with this
• Print the rest of the name (do not include the space)
• Print 3 a characters starting at index 4. You can assume there are at least 7 character in the name.

To get just the first name, you need to know the index of the first space. You can find the index of the first space with the indexOf method. str.indexOf(" ") will return the index of the first space or -1 if there are no spaces in str. You can assume there is at least one space so you do not need to worry about -1 for this problem.

For the draft, do the first two steps.

4C draft:
4C final: