蕞簡單dē漩嵂: 报错了 Ign:1 https://pkg.jenkins.io/debian-stable binary/ InRelease Hit:2 http://kali.download/kali kali-rolling InRelease Get:3 https://pkg.jenkins.io/debian-stable binary/ Release [2,044 B] Get:4 https://pkg.jenkins.io/debian-stable binary/ Release.gpg [833 B] Ign:4 https://pkg.jenkins.io/debian-stable binary/ Release.gpg Reading package lists... Done W: GPG error: https://pkg.jenkins.io/debian-stable binary/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5BA31D57EF5975CA E: The repository 'http://pkg.jenkins.io/debian-stable binary/ Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.

2301_78415972: 引用计数器算法，引用失效计数器值-1吧

征途黯然.: 感谢博主，你的文章让我得到一些收获！(￣ˇ￣)

m0_63305279: 真的有用hhh好厉害

刘二火: public MyClient(String host, int port) { this(ManagedChannelBuilder.forAddress(host, port) .usePlaintext() .build()); }这里吧，不过我还是报错