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Use ByteBuffer for Socket communication

import java.io.IOException; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.nio.ByteBuffer; import java.nio.channels.Channels; import java.nio.channels.SocketChannel; import java.nio.channels.WritableByteChannel; public class MainClass {   public static void main(String[] args) throws Exception {     int port = 19;     SocketAddress address = new InetSocketAddress("127.0.0.1", port);     SocketChannel client = SocketChannel.open(address);     ByteBuffer buffer = ByteBuffer.allocate(74);     WritableByteChannel out = Channels.newChannel(System.out);     while (client.read(buffer) != -1) {       buffer.flip();       out.write(buffer);       buffer.clear();     }   } }