public interface SourceDataLine extends DataLine
Note that the naming convention for this interface reflects the relationship between the line and its mixer. From the perspective of an application, a source data line may act as a target for audio data.
 A source data line can be obtained from a mixer by invoking the
 getLineMixer with
 an appropriate DataLine.Info
 The SourceDataLine interface provides a method for writing
 audio data to the data line's buffer. Applications that play or mix
 audio should write data to the source data line quickly enough to keep the
 buffer from underflowing (emptying), which could cause discontinuities in
 the audio that are perceived as clicks.  Applications can use the
 availableDataLine interface to determine the amount of data currently
 queued in the data line's buffer.  The amount of data which can be written
 to the buffer without blocking is the difference between the buffer size
 and the amount of queued data.  If the delivery of audio output
 stops due to underflow, a STOPSTART
Mixer, 
DataLine, 
TargetDataLineDataLine.Info| Modifier and Type | Method and Description | 
|---|---|
| void | open(AudioFormat format)Opens the line with the specified format, causing the line to acquire any
 required system resources and become operational. | 
| void | open(AudioFormat format,
    int bufferSize)Opens the line with the specified format and suggested buffer size,
 causing the line to acquire any required
 system resources and become operational. | 
| int | write(byte[] b,
     int off,
     int len)Writes audio data to the mixer via this source data line. | 
available, drain, flush, getBufferSize, getFormat, getFramePosition, getLevel, getLongFramePosition, getMicrosecondPosition, isActive, isRunning, start, stopaddLineListener, close, getControl, getControls, getLineInfo, isControlSupported, isOpen, open, removeLineListenervoid open(AudioFormat format, int bufferSize) throws LineUnavailableException
 The buffer size is specified in bytes, but must represent an integral
 number of sample frames.  Invoking this method with a requested buffer
 size that does not meet this requirement may result in an
 IllegalArgumentException.  The actual buffer size for the open line may
 differ from the requested buffer size.  The value actually set may be
 queried by subsequently calling DataLine.getBufferSize()
 If this operation succeeds, the line is marked as open, and an
 OPEN
 Invoking this method on a line which is already open is illegal
 and may result in an IllegalStateException.
 
 Note that some lines, once closed, cannot be reopened.  Attempts
 to reopen such a line will always result in a
 LineUnavailableException.
format - the desired audio formatbufferSize - the desired buffer sizeLineUnavailableException - if the line cannot be
 opened due to resource restrictionsIllegalArgumentException - if the buffer size does not represent
 an integral number of sample frames,
 or if format is not fully specified or invalidIllegalStateException - if the line is already openSecurityException - if the line cannot be
 opened due to security restrictionsopen(AudioFormat), 
Line.open(), 
Line.close(), 
Line.isOpen(), 
LineEventvoid open(AudioFormat format) throws LineUnavailableException
 The implementation chooses a buffer size, which is measured in bytes but
 which encompasses an integral number of sample frames.  The buffer size
 that the system has chosen may be queried by subsequently calling
 DataLine.getBufferSize()
 If this operation succeeds, the line is marked as open, and an
 OPEN
 Invoking this method on a line which is already open is illegal
 and may result in an IllegalStateException.
 
 Note that some lines, once closed, cannot be reopened.  Attempts
 to reopen such a line will always result in a
 LineUnavailableException.
format - the desired audio formatLineUnavailableException - if the line cannot be
 opened due to resource restrictionsIllegalArgumentException - if format
 is not fully specified or invalidIllegalStateException - if the line is already openSecurityException - if the line cannot be
 opened due to security restrictionsopen(AudioFormat, int), 
Line.open(), 
Line.close(), 
Line.isOpen(), 
LineEventint write(byte[] b,
          int off,
          int len)
available
 The number of bytes that can be written without blocking can be ascertained
 using the availableDataLine interface.  (While it is guaranteed that
 this number of bytes can be written without blocking, there is no guarantee
 that attempts to write additional data will block.)
 
 The number of bytes to write must represent an integral number of
 sample frames, such that:
 
 
[ bytes written ] % [frame size in bytes ] == 0IllegalArgumentException.b - a byte array containing data to be written to the data linelen - the length, in bytes, of the valid data in the array
 (in other words, the requested amount of data to write, in bytes)off - the offset from the beginning of the array, in bytesIllegalArgumentException - if the requested number of bytes does
 not represent an integral number of sample frames,
 or if len is negativeArrayIndexOutOfBoundsException - if off is negative,
 or off+len is greater than the length of the array
 b.TargetDataLine.read(byte[], int, int), 
DataLine.available() Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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