CMIS 242

Assignment 1

Object and Instance

Before attempting this assignment, be sure you have completed all the reading assignments, non-

graded exercises, discussions, and assignments to date.

Overview This assignment consists of two classes that will be implemented. A Weight.java class that has

three private variables, two private methods and four public methods and a Project.java class

that has three private methods. The goal of this assignment is to perform calculations using

Weight objects (instances of Weight class).

Weight Class Weight class should have three private variables, two private methods and four public methods.

Variables

Hint: How should/can you access these private variables?

1. A private constant variable called OUNCES_IN_A_POUND that defines the number of ounces in a pound (16).

2. A private variable called pounds with a data type of integer.

3. A private variable called ounces with a data type of double.

Methods

1. A public parameterized constructor, which initializes the private variables.

public Weight (int pounds, double ounces){ // implementation

}

2. A private instance method called toOunces with a return type of double. This method has no parameters and should return the total number of ounces. For full credit, reuse this method

across other methods when possible.

3. A private instance method called normalize with a return type of void. This method has no parameters and should ensure that the number of ounces is less than the number of ounces in a

pound. For full credit, reuse this method across other methods when possible.

4. A public instance method called lessThan with a return type of boolean. This method should accept a Weight object as a parameter and determine if the object is greater or less than

the initialized values.

public boolean lessThan (Weight weight){ // implementation

}

5. A public instance method called addTo with a return type of void. This method should accept a Weight object as a parameter and add the object’s weight values to the initialized

values.

public void addTo (Weight weight){ // implementation

}

6. A public instance method called toString with a return type of String. This method has no parameters and should have the following format:

x pounds and y ounces

where x is the number of pounds and y the number of ounces. Ounces should be

displayed with two decimal places.

Project1 Class Project1 class should have three private methods and one public method.

Methods

1. A private class method named findMinimum with a return type of Weight. This method should accept three Weight objects as parameters and compare each Weight object’s

weight values to find the minimum. The Weight object with the minimum weight value

should be returned and then printed using toString in the following format:

The minimum weight is x pounds and y ounces

where x is the number of pounds and y the number of ounces. Ounces should be

displayed with two decimal places.

2. A private class method named findMaximum with a return type of Weight. This method should accept three Weight objects as parameters and compare each Weight object’s weight

values to find the maximum. The Weight object with the maximum weight value should be

returned and then printed using toString in the following format:

The maximum weight is x pounds and y ounces

where x is the number of pounds and y the number of ounces. Ounces should be

displayed with two decimal places.

3. A private class method named findAverage with a return type of Weight. This method should accept three Weight objects as parameters and calculate the average weight value. A new

Weight object with the average weight values should be returned and then printed using toString

in the following format:

The average weight is x pounds and y ounces

where x is the number of pounds and y the number of ounces. Ounces should be

displayed with two decimal places.

4. A public method named main with a return type of void. This method should exercise the correct functionality of findMinimum, findMaximum and findAverage by creating three

Weight objects using the hardcoded values below:

Weight weight1 = new Weight(11, 3); Weight weight2 = new Weight(7, 20); // Hint: normalize method should be used to translate into 8 pounds and 4 ounces Weight weight3 = new Weight(14, 6);

Submission Requirements

Style and Documentation Make sure your Java program is using the recommended style such as:

• Javadoc comment with your name as author, date, and brief purpose of the program

• Comments for variables and blocks of code to describe major functionality

• Meaningful variable names and prompts

• Class names are written in upper CamelCase

• Constants are written in All Capitals

• Use proper spacing and empty lines to make code human readable

Deliverables The submission requires uploading a single zip file, which will contain:

1. The source code of Weight.java (do not include the class file) 2. The source code of Project1.java (do not include the class file) 3. A single document (DOC/DOCX or PDF), which includes the test case(s) in a tabular

format and screenshot(s) of the test runs for the test case(s). Do not submit the

screenshot(s) separately as they should be included in this document. Below is an

example of a test case table to follow:

Test # Input Values

(Values as Input)

Expected Output Actual

Output

Pass or

Fail

(What is Expected as

Result)

(Output

obtained by

code

execution)

(If test

passed or

failed)

Test 1 Weight weight1 =

new Weight(11, 3)

Weight weight2 =

new Weight(7, 20)

Weight weight3 =

new Weight(14, 6)

Created weight1 with 11

pounds and 8 ounces

Created weight2 with 8

pounds and 4 ounces

Created weight3 with 14

pounds and 6 ounces

Screenshot(s)

of the Output

(Result

obtained by

executing the

code)

Include the screenshot(s) here

Grading Rubric Criteria Level 3 Level 2 Level 1

Weight

class

(31-40 points)

Implemented the

specifications and logic

components

(21-30 points)

Not implemented some of

the logic and specification

components

(0-20 points)

Not implemented most

of the logic and

specification

components

Project1

class

(31-40 points)

Implemented the

specifications and logic

components

(21-30 points)

Not implemented some of

the logic and specification

components

(0-20 points)

Not implemented most

of the logic and

specification

components

Test

cases

(11-20 points)

Included the test cases

with the screen shot(s)

using the tabular format

(6 - 10 points)

Not included some of the

test case using the screen

shot(s) using the tabular

format

(0 – 5 points)

Not included most of

the test cases with the

screen shot(s)