Linux 如何在 Ubuntu 上设置 JAVA_HOME 路径?
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How to set JAVA_HOME path on Ubuntu?
提问by MChan
How can I setup JAVA_HOME
path without having to set it each time I restart my machine?
如何设置JAVA_HOME
路径而不必每次重新启动机器时都设置它?
I've used the following ways when trying to set JAVA_HOME on my Ubuntu machine:
尝试在我的 Ubuntu 机器上设置 JAVA_HOME 时,我使用了以下方法:
1) From terminal I've executed the following command:
1)从终端我执行了以下命令:
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0
2) I've edited the /etc/enviroment
file directly to add JAVA_HOME
path in it
2)我/etc/enviroment
直接编辑了文件以JAVA_HOME
在其中添加路径
What's really strange is that if I test JAVA_HOME
using the echo
command after an of the above two ways, I can see it is set correctly, but if I restart, logout/ login again or even after working on the machine for a while the JAVA_HOME
is no more set and I have to set it again using any of the above two ways.
真正奇怪的是,如果我在上述两种方式中的一种之后JAVA_HOME
使用该echo
命令进行测试,我可以看到它设置正确,但是如果我重新启动,注销/再次登录,甚至在机器上工作一段时间后,它就JAVA_HOME
不再存在了设置,我必须使用上述两种方式中的任何一种重新设置它。
So can someone please tell me what I am doing wrong here?
那么有人可以告诉我我在这里做错了什么吗?
采纳答案by Nasir
I normally set paths in
我通常设置路径
~/.bashrc
However for Java, I followed instructions at https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7
但是对于 Java,我按照https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7 上的说明进行操作
and it was sufficient for me.
这对我来说已经足够了。
you can also define multiple java_home's and have only one of them active (rest commented).
您还可以定义多个 java_home 并且只有其中一个处于活动状态(其余评论)。
suppose in your bashrc file, you have
假设在你的 bashrc 文件中,你有
export JAVA_HOME=......jdk1.7
export JAVA_HOME=......jdk1.7
#export JAVA_HOME=......jdk1.8
#export JAVA_HOME=......jdk1.8
notice 1.8 is commented. Once you do
注释 1.8 已注释。一旦你这样做
source ~/.bashrc
source ~/.bashrc
jdk1.7 will be in path.
jdk1.7 将在路径中。
you can switch them fairly easily this way. There are other more permanent solutions too. The link I posted has that info.
您可以通过这种方式轻松切换它们。还有其他更持久的解决方案。我发布的链接有这些信息。
回答by morgano
add JAVA_HOME to the file:
将 JAVA_HOME 添加到文件中:
/etc/environment
for it to be available to the entire system (you would need to restart Ubuntu though)
使其可用于整个系统(尽管您需要重新启动 Ubuntu)