如何在 Ubuntu 上设置 JAVA_HOME 路径? [英] How to set JAVA_HOME path on Ubuntu?

问题描述

如何设置 JAVA_HOME 路径而不必每次重新启动机器时都设置它?

How can I setup JAVA_HOME path without having to set it each time I restart my machine?

在我的 Ubuntu 机器上尝试设置 JAVA_HOME 时，我使用了以下方法:

I've used the following ways when trying to set JAVA_HOME on my Ubuntu machine:

1) 从终端我执行了以下命令:

1) From terminal I've executed the following command:

export JAVA_HOME=/usr/lib/jvm/jdk1.7.0

2) 我直接编辑了 /etc/enviroment 文件以在其中添加 JAVA_HOME 路径

2) I've edited the /etc/enviroment file directly to add JAVA_HOME path in it

真正奇怪的是，如果我在上述两种方式之一之后使用 echo 命令测试 JAVA_HOME，我可以看到它设置正确，但是如果我重新启动, 注销/重新登录，甚至在机器上工作一段时间后 JAVA_HOME 不再设置，我必须使用上述两种方式中的任何一种重新设置.

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.

那么有人可以告诉我我在这里做错了什么吗?

So can someone please tell me what I am doing wrong here?

推荐答案

我通常在

~/.bashrc

但是对于 Java，我按照说明进行操作https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7

However for Java, I followed instructions at https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7

这对我来说已经足够了.

and it was sufficient for me.

你也可以定义多个 java_home 并且只有其中一个处于活动状态(其余注释).

you can also define multiple java_home's and have only one of them active (rest commented).

假设在你的 bashrc 文件中，你有

suppose in your bashrc file, you have

导出JAVA_HOME=......jdk1.7

#export JAVA_HOME=......jdk1.8

注释 1.8 已注释.一旦你这样做

notice 1.8 is commented. Once you do

source ~/.bashrc

jdk1.7 将在路径中.

jdk1.7 will be in path.

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.我发布的链接包含该信息.

you can switch them fairly easily this way. There are other more permanent solutions too. The link I posted has that info.

这篇关于如何在 Ubuntu 上设置 JAVA_HOME 路径?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！