<< Chapter < Page
  Accessible objected-oriented     Page 6 / 17
Chapter >> Page >

The treble clef and bass clef data

As explained earlier, a text file containing data for the treble clef must be provided. (Actually, it doesn't matter which clef is represented by the single required text file. It could be data for the bass clef if you want tohear that absent of the treble clef melody. It could even be random notes. However, I will continue to refer to the treble clef and the bass clef as aconvenient way to distinguish between the contents of the two text files.)

If bass data (the optional second text file) is provided, the output audio data will be interlaced in the output melody array so that thebass will be played through the left speaker and the treble will be played through the right speaker.

The code in Listing 7 sets the value for channels to either 2 for stereo or 1 for monaural.

Beats per second

Listing 7 also gets and saves the value of beatsPerSec from the args array. Recall that this value determines how fast or slow the notes will be played. A low value causes the note to be played slowly and ahigher value causes the notes to be played faster.

Get and save treble clef note data

The code in Listing 8 reads the text file (from the subfolder named Music ) containing the data for the treble clef and saves that data in an ArrayList object in a form that is suitable for processing later. (Hopefully you are familiar with the ArrayList class as a result of your studies of the Collections Framework in general and the module titled Java4040: Purpose of Framework Implementations and Algorithms in particular.)

Listing 8 . Get and save treble clef note data.
try{ trebleClef = new ArrayList();BufferedReader in = new BufferedReader( new FileReader("Music/" + trebleFileName));String str; while ((str = in.readLine()) != null) {//Split the input string into multiple substrings using the comma as // the delimiter and save them in an array object.String[] strArr = str.split(",");//Ignore: // Blank lines that result in a string with a zero length// Comments that begin with a / // Lines that begin with a spaceif(strArr[0].length() != 0&&!(strArr[0].substring(0,1).equals("/"))&&!(strArr[0].substring(0,1).equals(" "))){//Add the array to the end of the list. trebleClef.add(strArr);}//end if}//end while in.close();//close the input file

Consider the format of the line of text shown near the end of Listing 30 that reads:

9,A3,C4,E4

To play this note on a piano, the user would press three piano keys simultaneously and hold them down for nine beats.

Parsing the treble clef note data

The code in Listing 8 reads each line of text from the text file and parses it into two or more strings using the comma as a delimiter. The two or morestrings are placed in an array object of type String[] and that object's reference is added to the ArrayList object.

Every line of text that is not ignored will contain at least two items separated by commas. The first item must be a number. This is the amount of time that the note willbe held when it is played. The remaining one or more items specify the piano keys that are to be pressed simultaneously to play that note. Therefore, thearrays that are created from the lines of text in the text file are likely to be of different lengths with the minimum length of two elements. The more complicated themelody, the more likely is the occurrence of arrays with more than two elements.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Accessible objected-oriented programming concepts for blind students using java. OpenStax CNX. Sep 01, 2014 Download for free at https://legacy.cnx.org/content/col11349/1.17
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Accessible objected-oriented programming concepts for blind students using java' conversation and receive update notifications?

Ask