發出聲音

generate_sound.java

import javax.sound.sampled.AudioFormat;

import javax.sound.sampled.AudioSystem;

import javax.sound.sampled.LineUnavailableException;

import javax.sound.sampled.SourceDataLine;

public class generate_sound {

public static void main(String[] args) throws LineUnavailableException {

// TODO Auto-generated method stub

double Do = 261.6;

double Re = 293.7;

double Mi = 329.6;

double Fa = 349.2;

double So = 392.0;

double La = 440;

double Si = 493.9;

double H_Do = 523.3;

play(Do);

play(Re);

play(Mi);

play(Fa);

play(So);

play(La);

play(Si);

play(H_Do);

}

static void play(double note) throws LineUnavailableException{

byte[] buf = new byte[ 1 ];

AudioFormat af = new AudioFormat( (float )44100, 8, 1, true, false );

SourceDataLine sdl = AudioSystem.getSourceDataLine( af );

sdl.open();

sdl.start();

for( int i = 0; i < 1000 * (float )44100 / 2000; i++ ) {

double angle = i / ( (float )44100 / note ) * 2.0 * Math.PI;

buf[ 0 ] = (byte )( Math.sin( angle ) * 100 );

sdl.write( buf, 0, 1 );

}

sdl.drain();

sdl.stop();

}

}