new Thread(new ThreadStart(this.StartServer))

UDP服务器启动示例
本文介绍了一个使用新线程启动UDP服务器的简单示例。通过创建新的线程并指定服务器启动函数作为线程任务,实现了UDP服务器的基础搭建。

Thread .new thUdpServer 

 

thUdpServer = new Thread(new ThreadStart(this.StartServer))

转载于:https://www.cnblogs.com/endv/p/6821769.html

### 创建新线程处理客户端套接字连接 在 Java 中,可以通过多种方式创建新线程来处理客户端套接字连接。以下是几种常见的方式: #### 方法一:使用 `Thread` 类 可以直接继承 `Thread` 类并重写其 `run()` 方法,在其中编写处理客户端请求的逻辑。 ```java public class ServerTask extends Thread { private Socket clientSocket; public ServerTask(Socket socket) { this.clientSocket = socket; } @Override public void run() { try ( BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true) ) { String inputLine; while ((inputLine = in.readLine()) != null) { System.out.println("Received from client: " + inputLine); out.println("Echo: " + inputLine); if (inputLine.equals("bye")) break; } } catch (IOException e) { e.printStackTrace(); } finally { try { clientSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } ``` 在一个服务器端程序中启动该线程时,可以这样实现[^1]: ```java ServerSocket serverSocket = new ServerSocket(8080); while (true) { Socket clientSocket = serverSocket.accept(); new ServerTask(clientSocket).start(); } ``` --- #### 方法二:使用 `Runnable` 接口 相比直接继承 `Thread` 类,更推荐实现 `Runnable` 接口,因为这不会占用类的唯一继承机会。 ```java public class ServerTask implements Runnable { private final Socket clientSocket; public ServerTask(Socket socket) { this.clientSocket = socket; } @Override public void run() { try ( BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true) ) { String inputLine; while ((inputLine = in.readLine()) != null) { System.out.println("Received from client: " + inputLine); out.println("Echo: " + inputLine); if (inputLine.equals("bye")) break; } } catch (IOException e) { e.printStackTrace(); } finally { try { clientSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } ``` 同样可以在服务器端启动线程时这样做: ```java ServerSocket serverSocket = new ServerSocket(8080); while (true) { Socket clientSocket = serverSocket.accept(); new Thread(new ServerTask(clientSocket)).start(); } ``` --- #### 方法三:使用线程池 (`ExecutorService`) 为了提高性能和减少频繁创建销毁线程带来的开销,建议使用线程池来管理线程。 ```java import java.io.*; import java.net.ServerSocket; import java.net.Socket; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class MultiThreadedServer { public static void main(String[] args) throws IOException { ExecutorService executorService = Executors.newFixedThreadPool(10); try (ServerSocket serverSocket = new ServerSocket(8080)) { while (true) { Socket clientSocket = serverSocket.accept(); executorService.submit(new ServerTask(clientSocket)); } } finally { executorService.shutdown(); } } } class ServerTask implements Runnable { private final Socket clientSocket; public ServerTask(Socket socket) { this.clientSocket = socket; } @Override public void run() { try ( BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true) ) { String inputLine; while ((inputLine = in.readLine()) != null) { System.out.println("Received from client: " + inputLine); out.println("Echo: " + inputLine); if (inputLine.equals("bye")) break; } } catch (IOException e) { e.printStackTrace(); } finally { try { clientSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } ``` 这种方法利用了固定大小的线程池来高效地分配任务给多个线程。 --- #### 使用虚拟线程(Project Loom) 如果正在使用支持虚拟线程的新版本 JDK,则可以用更加简洁的方式来实现多线程编程[^3]。 ```java try (ServerSocket serverSocket = new ServerSocket(8080)) { while (true) { Socket clientSocket = serverSocket.accept(); Thread.ofVirtual() .name("ClientHandler-" + clientSocket.getInetAddress()) .unstarted(new ServerTask(clientSocket)) .start(); } } catch (Exception e) { e.printStackTrace(); } ``` 这种方式能够显著降低上下文切换的成本,并允许同时运行大量轻量级线程。 ---
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