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import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Iterator;
public class Main {
public static void main(String[] argv) throws Exception {
Selector selector = Selector.open();
ServerSocketChannel ssChannel1 = ServerSocketChannel.open();
ssChannel1.configureBlocking(false);
ssChannel1.socket().bind(new InetSocketAddress(80));
ServerSocketChannel ssChannel2 = ServerSocketChannel.open();
ssChannel2.configureBlocking(false);
ssChannel2.socket().bind(new InetSocketAddress(81));
ssChannel1.register(selector, SelectionKey.OP_ACCEPT);
ssChannel2.register(selector, SelectionKey.OP_ACCEPT);
while (true) {
selector.select();
Iterator it = selector.selectedKeys().iterator();
while (it.hasNext()) {
SelectionKey selKey = (SelectionKey) it.next();
it.remove();
if (selKey.isAcceptable()) {
ServerSocketChannel ssChannel = (ServerSocketChannel) selKey.channel();
SocketChannel sc = ssChannel.accept();
ByteBuffer buf = ByteBuffer.allocate(100);
int numBytesRead = sc.read(buf);
if (numBytesRead == -1) {
sc.close();
} else {
// Read the bytes from the buffer
}
int numBytesWritten = sc.write(buf);
}
}
}
}
}
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