跳过字节Java NIO SocketChannel

Question

Let's assume I have SocketChannel is waiting for read. I don't want to read the first K bytes (as in, I don't want to copy them to a byte buffer, just skip them).

Is there anyway of doing so? there is no skip() method available.

Answer 1

I'm not sure if this is what you want to achieve, or even if it works as you want to, but you can get a Socket and then an InputStream from it.

Since you want to skip bytes, seems that work with I/O streams is the best solution.

    SocketChannel sock = SocketChannel.open();
    sock.connect(new InetSocketAddress("your addres or something", 80));

    InputStream ins = sock.socket().getInputStream();

    //Skip here
    ins.skip(5);

Edit

No, you cannot reuse what you have consumed with the input stream.

By the way, could you be more precise with "The allocation" problem? You can pipe the InputStream, so why do you say that you have to allocate a buffer? What is the target at the end?

Edit 2

There's an example that does not need to allocate K bytes

        ins.skip(1);

        ArrayList<Byte> bts = new ArrayList<>();

        int last = 0;
        while (last != -1) {
            last = in.read();
            bts.add((byte)last);
        }
        System.out.println(bts.stream().map(b -> new String(new byte[]{b.byteValue()})).collect(Collectors.joining()));