bug

最新推荐文章于 2025-06-26 16:20:36 发布

原创最新推荐文章于 2025-06-26 16:20:36 发布 · 155 阅读

CC 4.0 BY-SA版权

本文详细探讨了在Java UDP通信中，客户端在IDE环境下启动失败的问题，并提供了具体的解决方案。通过添加start()方法解决了客户端线程未启动的问题，同时强调了服务器端和客户端的正确调试方法。

public class TestServer implements Runnable{
    private DatagramSocket server;
    private String person;
    public TestServer(int port){
//        this.person = person;
        try {
            server = new DatagramSocket(port);
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
    @Override
    public void run() {
        while (true){
            byte[] b = new byte[1024*60];
            DatagramPacket packet = new DatagramPacket(b, 0, b.length);
            try {
                server.receive(packet);
                byte[] datas = packet.getData();
                int len = packet.getLength();
                String data = new String(datas, 0 , len);
                if (data.equals("bye")){
                    break;//退出
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        server.close();
    }
    // 创建 准备包裹 接收 分析 释放
    public static void main(String[] args) throws IOException {
        System.out.println("老师端启动");
        new Thread(new TestServer(8888)).start();
}
}

服务器端启动没问题

客户端（使用Idea和Eclipse）启动不了

客户端代码如下：

public class TestClient implements Runnable {
    private DatagramSocket client;
    private BufferedReader br;
    private String toIP;//对方IP
    private int toPort;

    public TestClient(int port, String toIP, int toPort) {
        this.toIP = toIP;
        this.toPort = toPort;
        try {
            client = new DatagramSocket(port);
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        while (true) {
            String data;
            try {
                data = br.readLine();
                byte[] datas = data.getBytes();
                DatagramPacket packet = new DatagramPacket(datas, 0, datas.length,
                        new InetSocketAddress(this.toIP, this.toPort));
                client.send(packet);
                if (data.equals("bye")) {
                    break;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        client.close();
    }

    // 创建 准备数据 打包 发送 释放
    public static void main(String[] args) throws IOException {
        System.out.println("学生端启动");
        new Thread(new TestClient(8000, "localhost", 8888));
}}

使用debug运行客户端出现：