java Ubuntu 16.04：未安装 Oracle JDK 9
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Ubuntu 16.04: Oracle JDK 9 is NOT installed
提问by Bugz
Every time I try to install something from terminal this message pops up to me. Meanwhile I have my Java installed right:
每次我尝试从终端安装某些东西时，都会弹出这条消息。同时，我正确安装了 Java：
download failed
Oracle JDK 9 is NOT installed.
dpkg: error processing package oracle-java9-installer (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
oracle-java9-installer
E: Sub-process /usr/bin/dpkg returned an error code (1)
Please can someone help me solve this; it's really annoying.
请有人帮我解决这个问题；这真的很烦人。
回答by Uddhav Gautam
sudo apt-get purge oracle-java9-installer
solved my issue. Later I also changed Ubuntu Software center server to "Main Server".
解决了我的问题。后来我也将 Ubuntu 软件中心服务器更改为“主服务器”。
回答by Prabodh M
Actually I hit the issue after resolving the wine installation on my Ubuntu 16.04 LTSbox. The wine issue I resolved using the below link.
实际上，我在解决了我的Ubuntu 16.04 LTS盒子上的 wine 安装后遇到了这个问题。我使用以下链接解决的葡萄酒问题。
So that landed me to this post. But I was not able to install the java from apt packages. It threw me errors. Then I realized it was the issue of having multiple Java instances on my system. I already had Oracle Java 9 installed. I just needed to change the current verions using the command
所以这让我找到了这篇文章。但是我无法从 apt 包安装 java。它给我带来了错误。然后我意识到这是我的系统上有多个 Java 实例的问题。我已经安装了 Oracle Java 9。我只需要使用命令更改当前版本
sudo update-alternatives --config java
So if any body hits the error, you can try setting this.
因此，如果任何主体遇到错误，您可以尝试设置它。
回答by Remus Dominic
I was getting the same error so using this command first i removed Java 9
我遇到了同样的错误，所以首先使用这个命令我删除了 Java 9
sudo apt remove oracle-java9-installer
Then I made Java 8 as default
然后我将 Java 8 设为默认值
sudo apt-get install oracle-java8-set-default
After this if you try to install other software it will work or you can also upgrade Java 8 to Java 9.
在此之后，如果您尝试安装其他软件，它将起作用，或者您也可以将 Java 8 升级到 Java 9。
回答by Yanish Pradhananga
First, add Oracle's PPA, then update your package repository.
首先，添加 Oracle 的 PPA，然后更新您的包存储库。
$sudo add-apt-repository ppa:webupd8team/java
$sudo apt-get update
To install JDK 9, use the following command:
要安装 JDK 9，请使用以下命令：
$sudo apt-get install oracle-java9-installer
回答by Deg
I'm not sure what steps you have tried already to install it but the link below is a fairly well explained description of how to install the JDK on Ubuntu. I've always installed the JDK through the webupd8team's ppa and its worked for me so far :)
我不确定您已经尝试过哪些步骤来安装它，但下面的链接很好地解释了如何在 Ubuntu 上安装 JDK。我一直通过 webupd8team 的 ppa 安装 JDK，到目前为止它对我有用:)
A note about the link, it suggests setting the home variable, this may be necessary for you but I've never had to it manually and it's worked so give it a quick check before setting the home variable yourself.
关于链接的说明，它建议设置 home 变量，这对您来说可能是必要的，但我从来没有手动设置过它并且它有效，所以在自己设置 home 变量之前快速检查一下。
https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04
https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04
回答by Bugz
Solved the problem removing all java versions and purging them and re-installing them again probably, thanks everyone who tried to help.
解决了删除所有 Java 版本并清除它们并可能再次重新安装它们的问题，感谢所有试图提供帮助的人。
回答by SkyWalker
Completely removal criteria:
完全去除标准：
To remove Oracle JDK completely, run the commands below:
要完全删除 Oracle JDK，请运行以下命令：
sudo apt-get remove oracle-java9-installer
sudo apt-get remove --auto-remove oracle-java9-installer
sudo apt-get purge oracle-java9-installer
sudo apt-get purge --auto-remove oracle-java9-installer
Resource Link:
资源链接：
https://www.howtoinstall.co/en/ubuntu/trusty/tomcat7?action=remove
https://www.howtoinstall.co/en/ubuntu/trusty/tomcat7?action=remove
After that, install jdk9 using the following command:
之后，使用以下命令安装 jdk9：
Install JDK9 in Ubuntu:
在 Ubuntu 中安装 JDK9：
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java9-installer
Make it as default:
将其设为默认值：
sudo apt-get install oracle-java9-set-default
Resource Link:
资源链接：
http://zakirrizvi.blogspot.com/2017/10/install-jdk9-in-ubuntu.html
http://zakirizvi.blogspot.com/2017/10/install-jdk9-in-ubuntu.html
