blocks|key|414831|text|按如下方式设置环境变量|type|unstyled|depth|inlineStyleRanges|entityRanges|data|414832|编辑系统路径文件/etc/profile|414833|sudo+gedit+/etc/profile|code-block|syntax|javascript|414834|在结尾处添加以下行|414835|JAVA_HOME=/usr/lib/jvm/jdk1.7.0
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export+JAVA_HOME
export+JRE_HOME
export+PATH|414836|然后注销并登录ubuntu以设置路径...|414837|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

set environment variables as follows

Edit the system Path file /etc/profile

<pre><code>sudo gedit /etc/profile
</code></pre>

Add following lines in end

<pre><code>JAVA_HOME=/usr/lib/jvm/jdk1.7.0
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH
</code></pre>

Then Log out and Log in ubuntu for setting up the paths...

blocks|key|414613|text|Java通常安装在/usr/java中，找到您拥有的版本，然后执行以下操作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|414614|假设您正在使用bash+(如果您刚开始使用，我建议您使用bash而不是其他shell)，您可以简单地输入bash来启动它。|414615|编辑~/.bashrc文件并添加路径，如下所示：|414616|例如。vi+~/.bashrc|414617|插入以下行：|414618|export+JAVA_HOME=/usr/java/<your+version+of+java>
export+PATH=${PATH}:${JAVA_HOME}/bin|code-block|syntax|javascript|414619|保存更改后，退出并重新启动bash，或者只需键入bash即可启动新的shell|414620|键入export以确保路径正确。|414621|键入java+-version以确保可以访问Java。|414622|entityMap^0|9|9|0|0|2|9|0|6|9|0|0|0|0|2|6|0|2|D|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|L|3|M|5|6|7|1A|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|1B|8|@]|D|@]|E|$Q|R]]|$1|S|3|T|5|6|7|1C|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|W|3|X|5|6|7|1G|8|@$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|Z|$]]

Java is typically installed in <code>/usr/java</code>
locate the version you have and then do the following:

Assuming you are using bash (if you are just starting off, i recommend bash over other shells) you can simply type in bash to start it.

Edit your <code>~/.bashrc</code> file and add the paths as follows:

for eg. vi <code>~/.bashrc</code>

insert following lines:

<pre><code>export JAVA_HOME=/usr/java/&lt;your version of java&gt;
export PATH=${PATH}:${JAVA_HOME}/bin
</code></pre>

after you save the changes, exit and restart your bash or just type in bash to start a new shell

Type in <code>export</code> to ensure paths are right.

Type in <code>java -version</code> to ensure Java is accessible.

blocks|key|629859|text|Ubuntu将openjdk6安装到/usr/lib/jvm/java-6-openjdk路径。因此，您将拥有/usr/lib/jvm/java-6-openjdk/bin中的回收站。通常，类路径是为java相关的可执行文件自动设置的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|629860|entityMap^0|I|R|1J|V|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Ubuntu installs openjdk6 to <code>/usr/lib/jvm/java-6-openjdk</code> path. So you will have the bin in <code>/usr/lib/jvm/java-6-openjdk/bin</code>. Usually the classpath is automatically set for the java &amp; related executables.

blocks|key|630026|text|如果你只安装了openJDK，你应该更新你的链接，因为你可以安装一些OpenJDK。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|630027|sudo+update-alternatives+--config+java|code-block|syntax|javascript|630028|在这之后|630029|$gedit+~/.bashrc|630030|在文件中添加以下行|630031|JAVA_HOME=/usr/lib/jvm/YOUR_JAVA_VERSION++export+PATH=$PATH:$JAVA_HOME/bin++export+JAVA_HOME|offset|length|style|CODE|630032|您可以通过以下命令获得java版本：|630033|java+-version|630034|entityMap^0|0|0|0|0|0|0|2K|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@$O|14|P|15|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

if you have intalled only openJDK, the you should update your links, because you can have some OpenJDK intallation.

<pre><code>sudo update-alternatives --config java
</code></pre>

after this

<pre><code>$gedit ~/.bashrc
</code></pre>

add the following line in the file

<code>JAVA_HOME=/usr/lib/jvm/YOUR_JAVA_VERSION
 export PATH=$PATH:$JAVA_HOME/bin
 export JAVA_HOME</code>

you can get you java version with

<pre><code>java -version
</code></pre>

blocks|key|414574|text|它应该将java放入路径中，可能放在/usr/bin/java中。找到它的最简单的方法是打开一个术语，然后键入"which+java“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|414575|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

It should put java in your path, probably in /usr/bin/java. The easiest way to find it is to open a term and type "which java".

blocks|key|415120|text|如何安装java包：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|415121|使用官方ubuntu包安装所需的java版本/版本，这些包使用替代包进行管理：|415122|sudo+apt+install+-y+openjdk-8-jdk|offset|length|style|CODE|415123|或/和其他版本：sudo+apt+install+-y+openjdk-11-jdk|415124|只有当您的计算机上的所有软件只有一个版本时，上述答案才是正确的，并且您可以跳过使用更新替代方案。所以你可以在.bashrc或其他地方快速硬编码它：|415125|export+JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64|415126|但这是不健康的，因为以后您可能会更改版本。|415127|设置JAVA_HOME+(以及可选的JAVA_SDK、JAVA_JRE+)的正确方法|415128|正确的方法(当您有多个更新选项时也是强制性的)是检测update-alternative指向的是什么，并始终使用update-alternative来切换活动版本。|415129|以下是对两者的建议:仅针对特定的unix帐户或针对所有帐户(计算机级别)。|415130|1.仅针对特定的unix帐户：|415131|如果您没有在计算机级别执行此操作的权限，请使用此选项。|415132|cat+<<'EOF'+>>~/.bashrc

export+JAVA_HOME=$(update-alternatives+--query+java+%7C+grep+Value+%7C+cut+-d"+"+-f2+%7C+sed+'s!$\/.*$jre$.*$!\1!g')
export+JDK_HOME=${JAVA_HOME}
export+JRE_HOME=${JDK_HOME}/jre/

EOF|code-block|syntax|javascript|415133|2.要在机器级别执行此操作，对于所有bourne+shell，您需要两个步骤：|415134|2.a|415135|cat+<<'EOF'+%7C+sudo+tee+/etc/profile.d/java_home_env.sh+>/dev/null

export+JAVA_HOME=$(update-alternatives+--query+java+%7C+grep+Value+%7C+cut+-d"+"+-f2+%7C+sed+'s!$\/.*$jre$.*$!\1!g')
export+JDK_HOME=${JAVA_HOME}
export+JRE_HOME=${JDK_HOME}/jre/

EOF|415136|由于您的shell在默认情况下可能未设置为交互式，因此您可能还需要执行此操作：|415137|2.b|415138|cat+<<'EOF'+%7C+sudo+tee+-a+/etc/bash.bashrc+>/dev/null
if+[+-d+/etc/profile.d+];+then
++for+i+in+/etc/profile.d/*.sh;+do
++++if+[+-r+$i+];+then
++++++.+$i
++++fi
++done
++unset+i
fi
EOF|415139|PS:应该不需要更新$PATH，因为update-alternatives会处理到/usr/bin/的链接。|415140|更多信息：https://manpages.ubuntu.com/manpages/trusty/man8/update-alternatives.8.html|415141|entityMap|0|LINK|mutability|MUTABLE|url|https://manpages.ubuntu.com/manpages/trusty/man8/update-alternatives.8.html^0|0|0|0|X|0|8|Y|0|0|0|1I|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|5|23|0|0^^$0|@$1|2|3|4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1W|8|@$F|1X|G|1Y|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1Z|8|@$F|20|G|21|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|22|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|23|8|@$F|24|G|25|H|I]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|26|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|27|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|28|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|29|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|2A|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|2B|8|@]|9|@]|A|$]]|$1|11|3|12|5|13|7|2C|8|@]|9|@]|A|$14|15]]|$1|16|3|17|5|6|7|2D|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2E|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|13|7|2F|8|@]|9|@]|A|$14|15]]|$1|1C|3|1D|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|6|7|2H|8|@]|9|@]|A|$]]|$1|1G|3|1H|5|13|7|2I|8|@]|9|@]|A|$14|15]]|$1|1I|3|1J|5|6|7|2J|8|@]|9|@]|A|$]]|$1|1K|3|1L|5|6|7|2K|8|@]|9|@$F|2L|G|2M|1|2N]]|A|$]]|$1|1M|3|-4|5|6|7|2O|8|@]|9|@]|A|$]]]|1N|$1O|$5|1P|1Q|1R|A|$1S|1T]]]]

<h1>How to install java packages:</h1>

Install desired java version / versions using official ubuntu packages, which are managed using alternatives: 
<code>sudo apt install -y openjdk-8-jdk</code> 
or/and other version: 
<code>sudo apt install -y openjdk-11-jdk</code> 

Above answers are correct only when you have only one version for all software on your machine, and you can skip using update-alternatives. So one can quickly hardcode it in .bashrc or some other place: 
<code>export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64</code> 
but it's not healthy, as later on you may change the version.

<h1>Correct way to set JAVA_HOME (and optionally JAVA_SDK, JAVA_JRE )</h1>

The correct way (and mandatory when you have more than one), is to detect what update-alternative is pointing to, and always use update-alternatives to switch active version.

Here are the suggestions for both: only specific unix account or for all accounts (machine level).

<h1>1. for a specific unix account only:</h1>

Use this if you don't have permissions to do it at machine level.

<pre><code>cat &lt;&lt;'EOF' &gt;&gt;~/.bashrc

export JAVA_HOME=$(update-alternatives --query java | grep Value | cut -d" " -f2 | sed 's!$\/.*$jre$.*$!\1!g')
export JDK_HOME=${JAVA_HOME}
export JRE_HOME=${JDK_HOME}/jre/

EOF
</code></pre>

<h1>2. To do it at machine level, and for all bourne shells, you need 2 steps:</h1>

2.a 

<pre><code>cat &lt;&lt;'EOF' | sudo tee /etc/profile.d/java_home_env.sh &gt;/dev/null

export JAVA_HOME=$(update-alternatives --query java | grep Value | cut -d" " -f2 | sed 's!$\/.*$jre$.*$!\1!g')
export JDK_HOME=${JAVA_HOME}
export JRE_HOME=${JDK_HOME}/jre/

EOF
</code></pre>

As your shell might not be set as interactive by default, you may want to do this also: 
2.b 

<pre><code>cat &lt;&lt;'EOF' | sudo tee -a /etc/bash.bashrc &gt;/dev/null
if [ -d /etc/profile.d ]; then
 for i in /etc/profile.d/*.sh; do
 if [ -r $i ]; then
 . $i
 fi
 done
 unset i
fi
EOF
</code></pre>

PS: There should be no need to update the $PATH, as update-alternatives takes care of the link to /usr/bin/. 
More on: <a href="https://manpages.ubuntu.com/manpages/trusty/man8/update-alternatives.8.html" rel="noreferrer">https://manpages.ubuntu.com/manpages/trusty/man8/update-alternatives.8.html</a>

blocks|key|415214|text|我有一个Linux+Lite3.8(它基于Ubuntu+16.04LTS)，在重启时更改以下文件(具有root权限)的路径会有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|415215|/etc/profile.d/jdk.sh|code-block|syntax|javascript|415216|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have a Linux Lite 3.8 (It bases on Ubuntu 16.04 LTS) and a path change in the following file (with root privileges) with restart has helped.

<pre><code>/etc/profile.d/jdk.sh
</code></pre>

blocks|key|630088|text|Step1：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|630089|sudo+gedit+~/.bash_profile|code-block|syntax|javascript|630090|Step2：|630091|JAVA_HOME=/home/user/tool/jdk-8u201-linux-x64/jdk1.8.0_201
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export+JAVA_HOME
export+JRE_HOME
export+PATH|630092|Step3：|630093|source+~/.bash_profile|630094|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Step1:

<pre><code>sudo gedit ~/.bash_profile
</code></pre>

Step2:

<pre><code>JAVA_HOME=/home/user/tool/jdk-8u201-linux-x64/jdk1.8.0_201
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH
</code></pre>

Step3:

<pre><code>source ~/.bash_profile
</code></pre>

blocks|key|630627|text|创建/打开~/.bashrc文件并添加引用$vim+~/.bashrc路径的JAVA_HOME和路径|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|630628|export+JAVA_HOME=/usr/java/<your+version+of+java>
export+PATH=${PATH}:${JAVA_HOME}/bin|code-block|syntax|javascript|630629|保存文件|630630|现在输入java+-+version，它应该会显示您在.bashrc文件中设置的内容。这将在会话中作为wel持久存在。|630631|示例：|630632|​|630633|📷|atomic|630634|630635|630636|630637|630638|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/4587cd2d6ea54ae4909401df98d4d293.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/bf6f067b93df08f8cc733096a72447be.png^0|5|9|L|E|0|0|0|0|0|0|0|1|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1F|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1G|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1H|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1J|8|@]|D|@]|E|$]]|$1|S|3|T|5|U|7|1K|8|@]|D|@$9|1L|A|1M|1|1N]]|E|$]]|$1|V|3|R|5|6|7|1O|8|@]|D|@]|E|$]]|$1|W|3|R|5|6|7|1P|8|@]|D|@]|E|$]]|$1|X|3|T|5|U|7|1Q|8|@]|D|@$9|1R|A|1S|1|1T]]|E|$]]|$1|Y|3|R|5|6|7|1U|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16|17|-4]]|18|$5|12|13|14|E|$15|19|17|-4]]]]

Create/Open <code>~/.bashrc</code> file <code>$vim ~/.bashrc</code>
Add JAVA_HOME and PATH as refering to your JDK path
<pre><code>export JAVA_HOME=/usr/java/&lt;your version of java&gt;
export PATH=${PATH}:${JAVA_HOME}/bin
</code></pre>
Save file
Now type java - version it should display what you set in .bashrc file.
This will persisted over session as wel.
Example :
<a href="https://i.stack.imgur.com/ZwZgG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZwZgG.png" alt="enter image description here" /></a>
<a href="https://i.stack.imgur.com/4lHVX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4lHVX.png" alt="enter image description here" /></a>

blocks|key|629902|text|打开jdk安装后，通常位于您的/usr/lib/java-6-openjdk像往常一样，您需要设置JAVA_HOME，calsspath和路径在ubuntu11.04中有一个环境文件在/etc中，您需要设置所有这三个路径。然后，您需要重新启动系统才能使更改生效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|629903|这里有一个网站可以帮助你了解http://aliolci.blogspot.com/2011/05/ubuntu-1104-set-new-environment.html|offset|length|629904|entityMap|0|LINK|mutability|MUTABLE|url|http://aliolci.blogspot.com/2011/05/ubuntu-1104-set-new-environment.html^0|0|E|20|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

open jdk once installed resides generally in your /usr/lib/java-6-openjdk
As usual you would need to set the JAVA_HOME, calsspath and Path
In ubuntu 11.04 there is a environment file available in /etc where you need to set all the three paths . And then you would need to restart your system for the changes to take effect.. 

Here is a site to help you around 
<a href="http://aliolci.blogspot.com/2011/05/ubuntu-1104-set-new-environment.html" rel="nofollow">http://aliolci.blogspot.com/2011/05/ubuntu-1104-set-new-environment.html</a>

blocks|key|630143|text|现在您所要做的就是设置“JAVA_HOME”和“PATH”环境变量，然后就完成了。输入以下命令来设置环境变量。确保您的环境变量指向您的机器上的有效JDK安装。对于Ubuntu18.04，路径为/usr/lib/jvm/java-8-openjdk-amd64/|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|630144|export+JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64|code-block|syntax|javascript|630145|要检查您的JAVA_HOME路径是否已成功保存，请输入以下命令进行检查。|630146|echo+$JAVA_HOME|630147|entityMap^0|B|B|N|6|2O|Y|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

All you have to do now is to set the <code>“JAVA_HOME”</code> and <code>“PATH”</code> environment variables and then you are done. Enter the following commands to set your environment variables. Make sure that your environment variables point to a valid installation of JDK on your machine. For Ubuntu 18.04, the path is <code>/usr/lib/jvm/java-8-openjdk-amd64/</code>

<pre><code>export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
</code></pre>

To check whether your JAVA_HOME path has been successfully saved, enter the following command to check.

<pre><code>echo $JAVA_HOME
</code></pre>

blocks|key|630177|text|使用文本编辑器打开文件并添加行JAVA_HOME="[path+to+your+java]"保存并关闭，然后运行source+/etc/environment|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|630178|entityMap^0|F|V|1K|N|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Open file <code>/etc/environment</code> with a text editor
Add the line <code>JAVA_HOME="[path to your java]"</code>
Save and close then run <code>source /etc/environment</code>

blocks|key|415269|text|从已安装的列表中设置java版本。有关已安装版本的列表，请运行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|415270|update-java-alternatives+--list|code-block|syntax|javascript|415271|然后根据以下命令设置您的java版本：|415272|sudo+update-java-alternatives+--set+/usr/lib/jvm/java-1.8.0-openjdk-amd64|415273|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Set java version from the list of installed. For see the list of the installed version run following command:

<pre><code>update-java-alternatives --list
</code></pre>

Then set your java version according to the following command:

<pre><code>sudo update-java-alternatives --set /usr/lib/jvm/java-1.8.0-openjdk-amd64
</code></pre>

blocks|key|414923|text|您可以从apt安装默认的Ubuntu(17.10)+java：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|414924|sudo+apt+install+openjdk-8-jdk-headless+|code-block|syntax|javascript|414925|它会为你设置路径，如果你需要安装特定版本的Java，你可以遵循这个YouTube|offset|length|414926|entityMap|0|LINK|mutability|MUTABLE|url|https://www.youtube.com/watch?v=WWDcC9QxcqE^0|0|0|X|7|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

You can install the default Ubuntu(17.10) java from apt:

<pre><code>sudo apt install openjdk-8-jdk-headless 
</code></pre>

And it will set the PATH for you, if instead you need to install specific version of Java you can follow this <a href="https://www.youtube.com/watch?v=WWDcC9QxcqE" rel="nofollow noreferrer">YouTube</a>

I just installed JDK in Ubuntu with <code>sudo apt-get install openjdk-6-jdk</code> command,
after the installation where's the Java <code>bin</code> directory located? And how can I set the environment path for that directory? I have little experience with Ubuntu, can anyone give some advice or suggest any good website for reference?

How to set Java environment path in Ubuntu

Ubuntu

Linux

Java

我刚刚用sudo apt-get install openjdk-6-jdk命令在Ubuntu中安装了JDK，安装后Java的bin目录在哪里？如何设置该目录的环境路径？我几乎没有使用Ubuntu的经验，有没有人能给我一些建议或者推荐一些好的网站供参考呢？

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