多线程socket

实现接收方和发送方在同一个文件内

public class Demo_Socket {
    public static void main(String[] args) throws IOException {
        new SocketReceive().start();
        
        new SocketSend().start();
    }
}

/**
 * socket 发送方
 * 
 * @author JerichoPH
 */
class SocketSend extends Thread {

    @Override
    public void run() {
        try {
            Scanner sc = new Scanner(System.in); // 获取键盘输入流
            DatagramSocket socket = new DatagramSocket(); // 创建socket对象
        
        while (true) {
            String line = sc.nextLine(); // 获取键盘录入
            if ("quit".equals(line)) { // 如果输入quit则退出连接
                break;
            }
            DatagramPacket packet = // 创建数据包对象
                    new DatagramPacket(line.getBytes(), line.getBytes().length, InetAddress.getByName("127.0.0.1"),
                            6666);
            socket.send(packet); // 发送数据包
        }
        socket.close(); // 关闭socket对象
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

/**
 * socket 接收方
 * 
 * @author JerichoPH
 */
class SocketReceive extends Thread {

    @Override
    public void run() {
        try {
            DatagramSocket socket = new DatagramSocket(6666); // 创建socket连接
            DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);
            
            while (true) {
                socket.receive(packet); // 接收消息
                
                byte[] arr = packet.getData(); // 提取数据
                int len = packet.getLength(); // 获取有效字节个数
                String ip = packet.getAddress().getHostAddress(); // 获取IP地址
                int port = packet.getPort(); // 获取端口号
                System.out.println(ip + ":" + port + ":" + new String(arr, 0, len));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}