import java.io.IOException;
import java.net.Socket;
import java.nio.ByteBuffer;

public class RSRevisionChecker {
	private static int findRS2Revision() throws IOException {
        int clientNo = 599;
        boolean success = false;
        ByteBuffer out = ByteBuffer.allocate(5);
        while (!success) {
            Socket socket = new Socket("world119.runescape.com", 43594);
            out.put((byte) 15);
            out.putInt(clientNo);
            socket.getOutputStream().write(out.array(), 0, 5);
            int rsp = socket.getInputStream().read();
            if (rsp == 0) {
                success = true;
            } else {
                socket.close();
                clientNo++;
            }
            out.clear();
        }
        return clientNo;
    }
	public static void main(String[] args) {
		try {
			System.out.println("Current RS Revision: "+findRS2Revision());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}