此代码不起作用。我添加了一些System.out.println("Start capturing...3");语句以了解错误在哪里，并且我看到错误在line.open(format);命令中。为什么我会遇到错误？
import javax.sound.sampled.*;
import java.io.*;
public class JavaSoundRecorder {
// record duration, in milliseconds
static final long RECORD_TIME = 4000;
File wavFile = new File("C:\\Users\\kecia\\R\\RecordAudio.wav");
AudioFileFormat.Type fileType = AudioFileFormat.Type.WAVE;
TargetDataLine line;
AudioFormat getAudioFormat()
{
float sampleRate = 16000;
//8000,11025,16000,22050,44100
int sampleSizeInBits = 8;
//8,16
int channels = 2;
//1,2
boolean signed = true;
//true,false
boolean bigEndian = true;
//true,false
return new AudioFormat(
sampleRate,
sampleSizeInBits,
channels,
signed,
bigEndian);
}
void start() {
try {
System.out.println("Start capturing...1");
AudioFormat format = getAudioFormat();
DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
System.out.println("Start capturing...2");
// checks if system supports the data line
if (!AudioSystem.isLineSupported(info)) {
System.out.println("Line not supported");
System.exit(0);
}
System.out.println("Start capturing...3");
line = (TargetDataLine) AudioSystem.getLine(info);
System.out.println("Start capturing...4");
////////////////////////////////////////////////////////////////////////
line.open(format);
////////////////////////////////////////////////////////////////////////
System.out.println("Start capturing...5");
line.start(); // start capturing
System.out.println("Start capturing...6");
AudioInputStream ais = new AudioInputStream(line);
System.out.println("Start recording...");
// start recording
AudioSystem.write(ais, fileType, wavFile);
} catch (LineUnavailableException ex) {
ex.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
void finish() {
line.stop();
line.close();
System.out.println("END");
}
public static void main(String[] args) {
final JavaSoundRecorder recorder = new JavaSoundRecorder();
// creates a new thread that waits for a specified
// of time before stopping
Thread stopper = new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(RECORD_TIME);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
recorder.finish();
}
});
stopper.start();
recorder.start();
}
}