UDP网络编程

本笔记来源于：尚硅谷Java零基础全套视频教程(宋红康2023版，java入门自学必备)
b站视频

代码示例：

//发送端
@Test
public void sender() throws IOException {

    DatagramSocket socket = new DatagramSocket();

    String str = "我是UDP方式发送的导弹";
    byte[] data = str.getBytes();
    InetAddress inet = InetAddress.getLocalHost();
    DatagramPacket packet = new DatagramPacket(data,0,data.length,inet,9090);

    socket.send(packet);

    socket.close();
}

//接收端
@Test
public void receiver() throws IOException {

    DatagramSocket socket = new DatagramSocket(9090);

    byte[] buffer = new byte[100];
    DatagramPacket packet = new DatagramPacket(buffer,0,buffer.length);

    socket.receive(packet);

    System.out.println(new String(packet.getData(),0,packet.getLength()));

    socket.close();
}