java.nio.FileChannel.write(ByteBuffer[] srcs) returns -1 when 0 bytes are written.

--------- test case ---------------
    public boolean writeGatheringTest01() {
String testName = "writeGatheringTest01" ;
String fileName = "test.dat" ;
int bufferCapacity = 3 ;
int numBuffers = 3 ;
ByteBuffer[] srcBuffers = new ByteBuffer[numBuffers] ;
FileChannel fc = Helper.openWriteFileChannel(new File(fileName));
int bytesWritten = -10 ; // some invalid value
if (fc == null) {
TestHelper.testFail(testName + " FAIL ") ;
}

for (int i = 0 ; i < numBuffers ; i ++) {
// initial position = 0, and limit = capacity
srcBuffers[i] = ByteBuffer.allocate(bufferCapacity) ;
// set limit = position = 0 (buffer empty)
srcBuffers[i].flip();
}

try {
// no data available in any of the buffers.
// write() should write 0 bytes and return 0
if ((bytesWritten = fc.write(srcBuffers)) != 0) {
return TestHelper.testFail(testName +
" FAIL: bytesWritten expected = 0" +
", actual = " + bytesWritten + ", pos = " + fc.position()) ;
}
} catch (Exception e) {
return TestHelper.testFail(testName + "FAIL: unexpected exception ! ", e);

}
return TestHelper.testPass(testName + "PASS");

    }
----------- results --------------

TestFailException: writeGatheringTest01 FAIL: bytesWritten expected = 0, actual = -1, pos = 0

-----------------------
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)