设置了JAVA_HOME和PATH，但java -version仍然显示旧的 [英] JAVA_HOME and PATH are set but java -version still shows the old one

问题描述

我正在使用Linux Mint Cinnamon 14.我已经在<设置了 $ JAVA_HOME 和 $ PATH 环境变量code>〜/ .profile 如下：

I am using Linux Mint Cinnamon 14. I have set the $JAVA_HOME and $PATH environment variables in ~/.profile as follows:

export JAVA_HOME=/home/aqeel/development/jdk/jdk1.6.0_35
export PATH=/home/aqeel/development/jdk/jdk1.6.0_35/bin:$PATH

然后我做 source~ / .profile 进行适当的更改。

I then did source ~/.profile to make the proper changes.

当我执行 java -version 命令来检查活动的java版本时，它显示了默认的（已经安装的open-jdk）java版本。如何使用我下载的版本覆盖默认的open-jdk？

When I execute java -version command to check the active java version, it shows the default (already installed open-jdk) java version. How can I override the default open-jdk with the one I downloaded?

更新：

哪个java 说/ usr / bin / java

which java says /usr/bin/java

$ JAVA_HOME / bin / java -version 说'Permission Denied'

$JAVA_HOME/bin/java -version says 'Permission Denied'

sudo $ JAVA_HOME / bin / java -version （请求密码，然后说）找不到命令

sudo $JAVA_HOME/bin/java -version (asks for password, then) says Command not found

但是 cd $ JAVA_HOME / bin ，和 ls 显示它是正确的目录。

but cd $JAVA_HOME/bin, and ls shows that it is right directory.

推荐答案

虽然看起来就像你的设置是正确的，有几件事要检查：

While it looks like your setup is correct, there are a few things to check:

1. env - 特别是 PATH 。


2. 哪个java 告诉你什么？


3. $ JAVA_HOME \ bin 中是否有 java 可执行文件它有执行位设置？如果不是 chmod a + x java it。

1. The output of env - specifically PATH.
2. which java tells you what?
3. Is there a java executable in $JAVA_HOME\bin and does it have the execute bit set? If not chmod a+x java it.

我相信你有<添加/更改 JAVA_HOME 后，code>来源'你的 .profile 和 PATH ？

I trust you have source'd your .profile after adding/changing the JAVA_HOME and PATH?

此外，您可以通过编写

export JAVA_HOME=/home/aqeel/development/jdk/jdk1.6.0_35
export PATH=$JAVA_HOME/bin:$PATH

。然后，您只需在设置JDK安装时更新一个env变量。

instead. Then you only need to update one env variable when you setup the JDK installation.

干杯，

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