import ohos.net.Socket;
import ohos.net.SocketException;
import ohos.net.SocketOption;
import ohos.net.SocketOptions;
import ohos.net.SocketAddress;
import ohos.net.Inet4Address;
import java.io.IOException;

public class UdpExample {
    public static void main(String[] args) {
        try {
            // 创建UDP Socket
            Socket socket = new Socket();

            // 设置Socket为非阻塞模式（可选）
            socket.setSocketOptions(SocketOptions.SO_NONBLOCK, true);

            // 设置远程主机地址和端口
            SocketAddress remoteAddress = new SocketAddress(new Inet4Address("192.168.0.1"), 8080);

            // 发送数据
            byte[] data = "Hello, UDP!".getBytes();
            socket.send(data, data.length, remoteAddress);

            // 接收数据
            byte[] buffer = new byte[1024];
            DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
            socket.receive(packet);

            // 处理接收到的数据
            String receivedData = new String(packet.getData(), 0, packet.getLength());
            System.out.println("Received: " + receivedData);

            // 关闭Socket
            socket.close();

        } catch (SocketException | IOException e) {
            e.printStackTrace();
        }
    }
}