java编写一个基于UDP的能够两人对聊的简单聊天程序
时间: 2024-03-21 21:44:04 浏览: 18
好的,下面是一个简单的Java基于UDP协议的聊天程序代码示例:
Server端:
```java
import java.net.*;
public class UDPServer {
public static void main(String[] args) throws Exception {
DatagramSocket serverSocket = new DatagramSocket(9876);
byte[] receiveData = new byte[1024];
byte[] sendData = new byte[1024];
while (true) {
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
serverSocket.receive(receivePacket);
String sentence = new String(receivePacket.getData());
InetAddress IPAddress = receivePacket.getAddress();
int port = receivePacket.getPort();
System.out.println("Client: " + sentence);
String capitalizedSentence = sentence.toUpperCase();
sendData = capitalizedSentence.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
serverSocket.send(sendPacket);
}
}
}
```
Client端:
```java
import java.net.*;
public class UDPClient {
public static void main(String[] args) throws Exception {
DatagramSocket clientSocket = new DatagramSocket();
InetAddress IPAddress = InetAddress.getByName("localhost");
byte[] sendData = new byte[1024];
byte[] receiveData = new byte[1024];
while (true) {
String sentence = "hello server";
sendData = sentence.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, 9876);
clientSocket.send(sendPacket);
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
clientSocket.receive(receivePacket);
String modifiedSentence = new String(receivePacket.getData());
System.out.println("Server: " + modifiedSentence);
}
}
}
```
运行Server端,然后运行两个Client端,分别进行通信即可。