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路径而不必在每次重新启动计算机时都进行设置?

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

在尝试在Ubuntu计算机上设置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)我从终端执行了以下命令:

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，请再次注销/登录，或者即使在继续进行之后JAVA_HOME的机器暂时没有再设置，我必须使用上述两种方式中的任何一种再次进行设置.

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做什么错吗?

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，我遵循以下说明 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

对我来说足够了.

您还可以定义多个java_home，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).

假设您的bashrc文件中有

suppose in your bashrc file, you have

export JAVA_HOME=......jdk1.7

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

notice 1.8已被注释.

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地切换它们.还有其他更永久的解决方案.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.

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