编辑：这是与下面相同的想法的更好的版本，将在您录制时直接播放
AudioFormat format = new AudioFormat(8000.0f, 16, 1, true, true); TargetDataLine microphone; SourceDataLine speakers; try { microphone = AudioSystem.getTargetDataLine(format); DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); microphone = (TargetDataLine) AudioSystem.getLine(info); microphone.open(format); ByteArrayOutputStream out = new ByteArrayOutputStream(); int numBytesRead; int CHUNK_SIZE = 1024; byte[] data = new byte[microphone.getBufferSize() / 5]; microphone.start(); int bytesRead = 0; DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, format); speakers = (SourceDataLine) AudioSystem.getLine(dataLineInfo); speakers.open(format); speakers.start(); while (bytesRead < 100000) { numBytesRead = microphone.read(data, 0, CHUNK_SIZE); bytesRead += numBytesRead; // write the mic data to a stream for use later out.write(data, 0, numBytesRead); // write mic data to stream for immediate playback speakers.write(data, 0, numBytesRead); } speakers.drain(); speakers.close(); microphone.close(); } catch (LineUnavailableException e) { e.printStackTrace(); }忍受我，因为这确实很粗糙，但是它可以通过扬声器播放录制的音频。
为了使其听起来更好，您将需要添加线程并优化输入/输出流。
http://www.developer.com/java/other/article.php/1579071/Java-Sound-Getting-
Started-Part-2-Capture-Using-Specified-
Mixer.htm
package audio;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import javax.sound.sampled.AudioFormat;import javax.sound.sampled.AudioInputStream;import javax.sound.sampled.AudioSystem;import javax.sound.sampled.DataLine;import javax.sound.sampled.LineUnavailableException;import javax.sound.sampled.SourceDataLine;import javax.sound.sampled.TargetDataLine;public class AudioTest { public static void main(String[] args) { AudioFormat format = new AudioFormat(8000.0f, 16, 1, true, true); TargetDataLine microphone; AudioInputStream audioInputStream; SourceDataLine sourceDataLine; try { microphone = AudioSystem.getTargetDataLine(format); DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); microphone = (TargetDataLine) AudioSystem.getLine(info); microphone.open(format); ByteArrayOutputStream out = new ByteArrayOutputStream(); int numBytesRead; int CHUNK_SIZE = 1024; byte[] data = new byte[microphone.getBufferSize() / 5]; microphone.start(); int bytesRead = 0; try { while (bytesRead < 100000) { // Just so I can test if recording // my mic works... numBytesRead = microphone.read(data, 0, CHUNK_SIZE); bytesRead = bytesRead + numBytesRead; System.out.println(bytesRead); out.write(data, 0, numBytesRead); } } catch (Exception e) { e.printStackTrace(); } byte audioData[] = out.toByteArray(); // Get an input stream on the byte array // containing the data InputStream byteArrayInputStream = new ByteArrayInputStream( audioData); audioInputStream = new AudioInputStream(byteArrayInputStream,format, audioData.length / format.getframeSize()); DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, format); sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo); sourceDataLine.open(format); sourceDataLine.start(); int cnt = 0; byte tempBuffer[] = new byte[10000]; try { while ((cnt = audioInputStream.read(tempBuffer, 0,tempBuffer.length)) != -1) { if (cnt > 0) { // Write data to the internal buffer of // the data line where it will be // delivered to the speaker. sourceDataLine.write(tempBuffer, 0, cnt); }// end if } } catch (IOException e) { e.printStackTrace(); } // Block and wait for internal buffer of the // data line to empty. sourceDataLine.drain(); sourceDataLine.close(); microphone.close(); } catch (LineUnavailableException e) { e.printStackTrace(); } }}
