import ohos.net.DatagramPacket;
import ohos.net.DatagramSocket;
import ohos.net.SocketException;
import ohos.net.SocketAddress;
import ohos.net.Inet4Address;
import java.io.IOException;

public class DatagramSocketExample {
    public static void main(String[] args) {
        try {
            // 创建DatagramSocket对象
            DatagramSocket socket = new DatagramSocket();

            // 设置本地端口（可选）
            socket.bind(new SocketAddress(new Inet4Address("0.0.0.0"), 8888));

            // 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[] sendData = "Hello, UDP!".getBytes();
            DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, remoteAddress);
            socket.send(sendPacket);

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

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

            // 关闭DatagramSocket
            socket.close();

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