Question

谁帮我写一个简单的JAVA程序，任务是用UDP写，请大手帮忙写一个思路~写个思路！

用JAVA里面的报头知识写一个利用udp协议的聊天程序！

Answer 1

给个例子你：
这是服务器端的：
import java.io.*;
import java.net.*;
import java.util.*;

public class UDPServer {
public static void main(String[] args) {
DatagramSocket server = null;
DatagramPacket out =null;
DatagramPacket in = null;

try {
server = new DatagramSocket(6666);
// 接收
byte[] buff = new byte[256];
in = new DatagramPacket(buff, buff.length);
server.receive(in);
System.out.println(new String(buff));
// 发送
byte[] res = new Date().toString().getBytes("GBK");
out = new DatagramPacket(res, res.length, in.getSocketAddress());
server.send(out);
server.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

这是客户端的：
import java.io.*;
import java.net.*;
import java.util.*;

public class UDPClient {
public static void main(String[] args) {
DatagramSocket client = null;
DatagramPacket out =null;
DatagramPacket in = null;

try {
client = new DatagramSocket();
// 要发送的消息（根据自己需要修改）
byte[] res = "Please give me your time!".getBytes("GBK");
out = new DatagramPacket(res, res.length, new InetSocketAddress("localhost", 6666));
client.send(out);
// 接收
byte[] buff = new byte[256];
in = new DatagramPacket(buff, buff.length);
client.receive(in);
System.out.println(new String(buff));
client.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
先运行服务器端再运行客户端

Answer 2

能详细说说需求么？