This project focuses on demonstrating your understanding of classes and objects.
ID: 3566606 • Letter: T
Question
This project focuses on demonstrating your understanding of classes and objects. Before attempting this project, be sure you have completed all of the reading assignments listed in the syllabus to date, participated in the weekly conferences, and thoroughly understand the examples throughout the chapters. The project requirements include:
Design and implement a stringed musical instrument violin class using the following guidelines:
1) to tune the instrument
2) to start the instrument playing
3) to stop the instrument from playing.
4) return number of strings
5) return an array of string names representing string names (e.g. E,A,D,G)
Create a UML class diagram using a diagram tool (e.g. PPT, Visio) of your choice. Prepare the diagrams and place them in a word document along with a brief description of each of your classes.
Create Java classes for your instruments. Be sure that your code matches your design specifications and some minimal functionality is included. For example, if you called the violin.play() method, you should at least print that the violin is playing. Similar functionality should be supplied when you stop playing, tune or call any of your methods. For example:
public void playviolin() {
System.out.println("The violin is now playing.");
}
Write the output from your Instrument class methods to a text file that a user entered from the command line arguments (e.g. java violinOutput.txt). This allows your program to accept filenames from the user via a command line argument.
Finally, create a Java test class that simulates using your instrument class. In your test class be you should at a minimum: a) Construct 10 instances of your instrument, b) tune your instruments, c) Start playing your instrument, d) Call your unique method such as write string numbers and names, and e) Stop playing your instruments. (Hint: Arrays and Loops will make your job easier and result in more efficient code!)
Your programs should compile and run without errors.
Be sure to test your program carefully. Provide a list of comprehensive test cases used to validate your application and include these test cases in your word document containing your UML diagrams and descriptions. Similar to Project 1, your test data can be shown in a table that includes input data, expected output, actual output and pass/fail results from the test.
-----
Output file example:
1 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
2 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
3 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
4 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
5 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
6 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
7 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
8 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
9 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
10 object:
The violin is now tunning . . .
The violin is now playing . . .
String numbers is 4 with String names are G D A E
The violin is now stopped.
Submission requirements:
Your deliverables include a Java instrument file, Java test file and a Word document. The Java instrument file should be named ViolinYournameP3.java. The Java test file should be named ViolinDriverYournameP3.java. Your word document should include your test table, and UML diagrams and descriptions and be named ViolinYournameP3.doc. Your completed assignment should be submitted to your Project 3 assignment area no later than the due date listed in the syllabus.
----- refer to more detail on the top
ViolinYournameP3.java must include
ViolinYournameP3 class
at least 4 private members
at least 1 constructor
at least 3 set methods
at least 2 get(return) methods
ViolinDriverYournameP3.java must include
main()
Explanation / Answer
public class Hippopotamus{
//fields to determine if the instrument is isTuned,
private boolean isTuned;
//and if the instrument is currently isPlaying.
private boolean isPlaying;
private String name;
private int numberOfStrings = 4; // number of strings
private String nameofStringsInInstrument[] = {"E", "C", "D", "A"}; //an array of string names
//A constructor method that set the isTuned and currently isPlaying fields to false.
public AndrewRubinFinalProject() {
this.isTuned = false;
this.isPlaying = false;
}
public String getNameOfInstrument() {
return this.name;
}
public void setNameOfInstrument(String nameOfInstrument) {
this.name = nameOfInstrument;
}
// Other methods
public boolean isPlaying() {
return this.isPlaying;
}
public void setPlaying(boolean playing) {
this.isPlaying = playing;
}
public boolean isTuned() {
return this.isTuned;
}
public void setTuned(boolean isTuned) {
this.isTuned = isTuned;
}
public void startPlayInstrument() {
System.out.println("The Instrument is now Playing.");
this.isPlaying = true;
}
public void stopPlayInstrument() {
System.out.println("The Instrument is not Playing anymore.");
this.isPlaying = false;
}
public void startTuneInstrument() {
System.out.println("The Instrument is Tuned.");
this.isTuned = true;
}
public void stopTuneInstrument() {
System.out.println("The Instrument is not Tuned.");
this.isTuned = false;
}
public int getNumberOfStrings() {
return this.numberOfStrings ;
}
public String[] getStringNames() {
return this.nameofStringsInInstrument;
}
}
A new program to test and run
public class Main
{
public static void main(String[] args){
Hippopotamus andrewsObject= new Hippopotamus();
// you can call any method in your class with respect to andrewsObject
// e.g.
// andrewsObject.setNameOfInstrument("Violin");
// String x= andrewsObject.getNameOfInstrument()
}
}
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