How to send data via UDP in java

1. Sending steps

Create the Socket object (DatagramSocket) of the sending end

Create data and package the data

Call the DatagramSocket object Method to send data

Close the sending end

2, instance

import java.net.*;
import java.io.*;
 
class  Send
{
public static void main(String[] args) throws Exception
{
DatagramSocket ds = new DatagramSocket();//通过DatagramSocket对象创建udp服务
BufferedReader bufr =
new BufferedReader(new InputStreamReader(System.in));//从键盘上面输入文本
String line = null;
while((line=bufr.readLine())!=null)//当输入不为空时
{
if("byebye".equals(line))//当输入为byebye时退出程序
break;
//确定好数据后，并把数据封装成数据包
byte[] buf = line.getBytes();
DatagramPacket dp =
new DatagramPacket(buf,buf.length,InetAddress.getByName("10.32.0.23"),30000);//发送至指定IP，指定端口
ds.send(dp);//通过send方法将数据包发送出去
}
ds.close();//关闭资源
}
}

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