我尝试使用webupd8team repo在ubuntu 16.04上安装java 9。我已经在同一台机器上安装了java 8。运行以下命令
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java9-installer
导致最后一个命令出现404错误：
Using wget settings from /var/cache/oracle-jdk9-installer/wgetrc
Downloading Oracle Java 9...
--2017-09-23 17:53:43-- http://download.java.net/java/jdk9/archive/181/binaries/jdk-9+181_linux-x64_bin.tar.gz
Auflösen des Hostnamen »download.java.net (download.java.net)«... 2.20.250.112, 2.20.250.104
Verbindungsaufbau zu download.java.net (download.java.net)|2.20.250.112|:80... verbunden. ### connected
HTTP-Anforderung gesendet, warte auf Antwort... 404 Not Found
2017-09-23 17:53:44 FEHLER 404: Not Found. ### 404
download failed
Oracle JDK 9 is NOT installed.
有没有办法更改网址，或者不再进行webupd8team的回购工作？