FileOperator(
        randomAccessFile!!.getChannel(),
      )
    val buffer = Buffer()
    operator.read(0, buffer, 5)
    assertThat(buffer.readUtf8()).isEqualTo("Hello")
    operator.read(4, buffer, 5)
    assertThat(buffer.readUtf8()).isEqualTo("o, Wo")
  }

  @Test
  fun write() {
    val operator =
      FileOperator(
        randomAccessFile!!.getChannel(),
      )

    public static byte[] readBytes(final File file) {
        assertArgumentNotNull("file", file);

        final FileInputStream is = InputStreamUtil.create(file);
        try {
            final FileChannel channel = is.getChannel();
            final ByteBuffer buffer = ByteBuffer.allocate((int) ChannelUtil.size(channel));
            ChannelUtil.read(channel, buffer);
            return buffer.array();
        } finally {

            FileChannel channel = null;
            FileLock lock = null;
            try {
                Properties props = new Properties();

                channel = new RandomAccessFile(touchfile, "rw").getChannel();
                lock = channel.lock();

                if (touchfile.canRead()) {
                    getLogger().debug("Reading resolution-state from: " + touchfile);

        }
        URL website = new URL(urlString);
        ReadableByteChannel rbc;
        rbc = Channels.newChannel(website.openStream());
        FileOutputStream fos = new FileOutputStream(destination);
        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
        fos.close();
        rbc.close();
    }

    return delegate!!.trafficClass
  }

  @Throws(IOException::class)
  override fun sendUrgentData(value: Int) {
    delegate!!.sendUrgentData(value)
  }

  override fun getChannel(): SocketChannel {
    return delegate!!.channel
  }

  override fun getHandshakeSession(): SSLSession {
    return delegate!!.handshakeSession
  }

  override fun getApplicationProtocol(): String {

     *            ファイル出力ストリーム
     * @return コピーしたバイト数
     */
    protected static int copyInternal(final FileInputStream in, final FileOutputStream out) {
        final FileChannel ic = in.getChannel();
        final FileChannel oc = out.getChannel();
        return (int) ChannelUtil.transfer(ic, oc);
    }

    /**
     * リーダーの内容をライターにコピーします。
     * <p>
     * リーダー、ライターともクローズされません。
     * </p>
     *

    try (FileOutputStream fos = new FileOutputStream(testFile)) {
      for (int i = 0; i < 500; i++) {
        fos.write(dummyData);
      }
    }
    try (ReadableByteChannel inChannel = new RandomAccessFile(testFile, "r").getChannel()) {
      ByteStreams.copy(inChannel, outChannel);
    }
    byte[] actual = out.toByteArray();
    for (int i = 0; i < 500 * chunkSize; i += chunkSize) {

    @Override
    public byte[] read() throws IOException {
      Closer closer = Closer.create();
      try {
        FileInputStream in = closer.register(openStream());
        return ByteStreams.toByteArray(in, in.getChannel().size());
      } catch (Throwable e) {
        throw closer.rethrow(e);
      } finally {
        closer.close();
      }
    }

    @Override
    public String toString() {

    try (FileOutputStream fos = new FileOutputStream(testFile)) {
      for (int i = 0; i < 500; i++) {
        fos.write(dummyData);
      }
    }
    try (ReadableByteChannel inChannel = new RandomAccessFile(testFile, "r").getChannel()) {
      ByteStreams.copy(inChannel, outChannel);
    }
    byte[] actual = out.toByteArray();
    for (int i = 0; i < 500 * chunkSize; i += chunkSize) {

void LazyFileOutputStream(String); public void LazyFileOutputStream(java.io.File); public void close() throws java.io.IOException; public boolean equals(Object); public void flush() throws java.io.IOException; public java.nio.channels.FileChannel getChannel(); public java.io.FileDescriptor getFD() throws java.io.IOException; public int hashCode(); public String toString(); public void write(byte[]) throws java.io.IOException; public void write(byte[], int, int) throws java.io.IOException; public void...