01.socket定义


02.TCP编程

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;


public class clientSocket {
    public static void main(String[] args) throws IOException {
        Socket socket=   new Socket(InetAddress.getLocalHost(),9999);
        System.out.println("客户端的socket"+socket.getClass());
        OutputStream outputStream= socket.getOutputStream();
        outputStream.write("hello ".getBytes());
        outputStream.close();
        socket.close();
    }
}

在这里插入代码片