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Listing 8 . The class named MusicComposer08.
/*File MusicComposer08.java Copyright 2014, R.G.BaldwinRevised 08/24/14 This program demonstrates late binding and runtime polymorphism using an arrayof the abstract type AudioSignalGenerator02 populated with references to objects of the following classes:AudioGraphSinusoidal AudioGraphSquareWaveFMSweep SquareWaveStereoPingpong ToneMonoTonesStereoWhiteNoise Each of the classes listed above extends the abstract class namedAudioSignalGenerator02 and overrides the abstract method named getMelody. After the array is populated, a random number generator is used to get arandom index into the array. The getMelody method is called on the reference pointed to by the random index. This causes the sound created by that audioobject to be played or filed. This is an example of late binding because the compiler cannot possibly know the value of the random index when the programis compiled. The sound can be played immediately or can be saved in an audio file oftype AU for playback later. You should be able to play the audio file with any standard media player that can handle the AU file type.The program also requires access to the following classes: AudioFormatParameters01AudioPlayOrFile01 AudioSignalGenerator02Tested using JDK 1.8 under Win 7. ******************************************************************************/import java.util.Random; public class MusicComposer08{//Instantiate an object containing audio format parameters with predefined // values. They may be modified by the signal generator at runtime. Values// allowed by Java SDK 1.4.1 are shown in comments in the class definition. AudioFormatParameters01 audioParams = new AudioFormatParameters01();//A buffer to hold the audio data that will be played or filed.byte[] melody;//A place to store the incoming args array.String[] args;//-------------------------------------------------------------------------// //Command-line parameter (only one parameter is needed)//If "play", the sound will be played immediately. Otherwise, the string will // be used as a filename for an audio file of type AU. In the latter case,// it must be a string that would be valid as a file name for the operating // system in use.public static void main(String[] args){//Instantiate a new object of this class. new MusicComposer08(args);}//end main //-------------------------------------------------------------------------//public MusicComposer08(String[]args){//constructor //Save the args array.this.args = args;//Create default args data if no args data is provided on the command line. if(args.length == 0){this.args = new String[1];this.args[0] = "play";//Play the melody immediately}//end if//Create an array capable of holding references to eight audio objects // instantiated from subclasses of the AudioSignalGenerator02 class.AudioSignalGenerator02[] audioObjects = new AudioSignalGenerator02[8];//Populate the array elements with references to eight different // audio objects.audioObjects[0] = new AudioGraphSinusoidal(audioParams,this.args,melody);audioObjects[1] = new AudioGraphSquareWave(audioParams,this.args,melody);audioObjects[2] = new FMSweep(audioParams,this.args,melody);audioObjects[3] = new SquareWave(audioParams,this.args,melody);audioObjects[4] = new StereoPingpong(audioParams,this.args,melody);audioObjects[5] = new ToneMono(audioParams,this.args,melody);audioObjects[6] = new TonesStereo(audioParams,this.args,melody);audioObjects[7] = new WhiteNoise(audioParams,this.args,melody);//Select an audio object at random and call the getMelody method on// the object. Random randomGenerator = new Random();int randomIndex = randomGenerator.nextInt(8); System.out.println("randomIndex = " + randomIndex);System.out.println(audioObjects[randomIndex].getClass());melody = audioObjects[randomIndex].getMelody(); //Play or file the audio datanew AudioPlayOrFile01(audioParams,melody,this.args[0]).playOrFileData();}//end constructor //-------------------------------------------------------------------------//}//end class MusicComposer08.java //===========================================================================//

Questions & Answers

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
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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
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