老是想请问，截图中最下面的host, port, password，我这里是不是应该填写我实际的阿里云ip地址加对应的端口号和密码？视频中老师用的${****}这个格式，但是似乎并没有说明这三个信息的具体值是写在哪个配置文件中了

输出1-150之间可以被5 整除的数 每输出三个进行换行

public class lainxi2 {
    public static void main(String[] args) {
        for (int  i=1;i<=1000;i++){
            if (i%5==0){
                System.out.print(i+"\t");
                int count = i;
                count ++;
                if (count%3==0){
                    System.out.println();
                }
            }
        }
        
    }
}
//输出1-150之间能被5整除的数 每输出三个进行换行

我的代码有问题吗 为什么执行结果的第一个数字 5自己一行呀

老师，请问，为什么这个jupyter notebook好几次都是用着就提示断开了，要重新打开才行

13分25秒catch（）中得Exception e是固定要写得还是老师随手定义个e啊

老师，我有一个疑问，这种携带登录信息，账号名密码的访问url，如果被发现是爬虫在访问了，不是直接就获取到我们的账号和密码了嘛

x1 = [(-)(-+width*num)]
y1 = [(-)(--width*num)]

老师，你好，我想问一下这两行代码问么解释，不太能理解。这里的400又是怎么来的

 t.goto(x1[0][0],x1[0][1])
# t.goto(x1[1][0],x1[1][1])

还有这两行代码也不理解，老师能帮助我理解一下吗

Collecting pyinstaller

  Downloading pyinstaller-4.1.tar.gz (3.5 MB)

ERROR: Exception:

Traceback (most recent call last):

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher

    yield

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read

    data = self._fp.read(amt) if not fp_closed else b""

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read

    data = self.__fp.read(amt)

  File "C:\Program Files\Python38\lib\http\client.py", line 458, in read

    n = self.readinto(b)

  File "C:\Program Files\Python38\lib\http\client.py", line 502, in readinto

    n = self.fp.readinto(b)

  File "C:\Program Files\Python38\lib\socket.py", line 669, in readinto

    return self._sock.recv_into(b)

  File "C:\Program Files\Python38\lib\ssl.py", line 1241, in recv_into

    return self.read(nbytes, buffer)

  File "C:\Program Files\Python38\lib\ssl.py", line 1099, in read

    return self._sslobj.read(len, buffer)

ConnectionResetError: [WinError 10054] 远程主机强迫关闭了一个现有的连接。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\base_command.py", line 188, in _main

    status = self.run(options, args)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\req_command.py", line 185, in wrapper

    return func(self, options, args)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\commands\install.py", line 332, in run

    requirement_set = resolver.resolve(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 179, in resolve

    discovered_reqs.extend(self._resolve_one(requirement_set, req))

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 362, in _resolve_one

    abstract_dist = self._get_abstract_dist_for(req_to_install)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 314, in _get_abstract_dist_for

    abstract_dist = self.preparer.prepare_linked_requirement(req)

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 467, in prepare_linked_requirement

    local_file = unpack_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 255, in unpack_url

    file = get_http_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 129, in get_http_url

    from_path, content_type = _download_http_url(

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\operations\prepare.py", line 281, in _download_http_url

    for chunk in download.chunks:

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\cli\progress_bars.py", line 166, in iter

    for x in it:

  File "C:\Program Files\Python38\lib\site-packages\pip\_internal\network\utils.py", line 15, in response_chunks

    for chunk in response.raw.stream(

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 564, in stream

    data = self.read(amt=amt, decode_content=decode_content)

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 529, in read

    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)

  File "C:\Program Files\Python38\lib\contextlib.py", line 131, in __exit__

    self.gen.throw(type, value, traceback)

  File "C:\Program Files\Python38\lib\site-packages\pip\_vendor\urllib3\response.py", line 443, in _error_catcher

    raise ProtocolError("Connection broken: %r" % e, e)

pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None)", ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None))

WARNING: You are using pip version 20.1.1; however, version 20.3.3 is available.

You should consider upgrading via the 'C:\Program Files\Python38\python.exe -m pip install --upgrade pip' command.

老师，这个报错可能是什么原因导致的？

老师我Mybatis打印的日志在IDEA中中文乱码，试了把File-Settings-FileEcondings里面改成utf-8，idea.exe.vmoptions 配置文件末尾追加一行设置（-Dfile.encoding=UTF-8）都不行

老师我的if计数是每5次换行为啥他有三次有四次呢

设置宽度为10会对半径为50存在影响吗，是将圆向外扩张吗

老师，启动服务端不应该是serverSocket=serverSocket.accept();吗？

因为上面new了一个 引用第一个数组的serverSocket

为啥是 socket=serverSocket.accept(); ?

我想让网页整出三个一行排列的图加字。用那些代码呀

老师，ApplicationContext启动spring和ClassPathXmlApplicationContext.start()启动spring有什么区别啊

this为什么会等于0X1，还有不是构造器中不是只有id,name吗,怎么来了一个this?

、视频的截图

我的截图 老师，我很懵，为什么没有payload?