我应该如何在macOS上设置JAVA_HOME环境变量？ [英] How should I set the JAVA_HOME environment variable on macOS?

问题描述

我知道这个问题之前已经被问了很多但是我确实已经阅读了，我会告诉你我得到了什么。

I know this question has been asked a lot before but i did read and i will show you what i got.

我将列出我所做的命令我的 OS X Yosemite 10.10.1

I will list the commands that i did in my OS X Yosemite 10.10.1

java -version

java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

java -fullversion

 java full version "1.8.0_45-b14"

哪个java

/usr/bin/java

Java home变量未设置，因为当我这样做时： echo $ java_home 或回显$ JAVA_HOME 或回显$ Java_Home 终端上什么都没有。

Java home variable is not set because when I do this: echo $java_home or echo $JAVA_HOME or echo $Java_Home i got nothing on the terminal.

做什么这个：ls -l <​​code>哪个java 我得到了这个：

when doing this: ls -l which java i got this:

8 lrwxr-xr-x  1 root  wheel  74 Nov 12  2014 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java

javac -version

javac 1.8.0_45

/ usr / libexec / java_home

/Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home

解决方案我认为在网上阅读后是正确的

The solution that I think is correct after reading on internet is

echo "export JAVA_HOME=`/usr/libexec/java_home`" >> ~/.profile  

但我害怕测试它，这就是我问你的原因，如果这是正确与否，如果不是我该怎么办？

but i am afraid to test it, that is why i am asking you, if that is correct or not and if not what should i do please?

推荐答案

我不知道为什么你害怕测试，您可以安全地测试这个：

I'm not sure why you are afraid to test, you can safely test this:

在您的终端会话中，输入以下内容：

In your terminal session, input the following:

echo "export JAVA_HOME=`/usr/libexec/java_home`"

这将打印以下行：

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home

复制上面的内容并将其粘贴到终端窗口，然后按回车键。并执行 java -version 以查看它是否正常工作。如果一切正常，您可以将代码附加到 .profile ：

Copy the above and paste it into your terminal window, then press enter key. and execute java -version to see it work correctly. If everything is okay, you can attach the code into your .profile:

但直接添加此行更好想法是因为升级JDK时不必更新 .profile 。

But adding this line directly is better idea because you don't have to update .profile when you upgrade JDK.

export JAVA_HOME=`/usr/libexec/java_home`

请参阅手册页 java_home 工具。简而言之，它为JAVA_HOME提供了在macOS上正常安装的适当路径

Please refer to the man page for the java_home tool. In short, it provides the appropriate path for JAVA_HOME for a normal installation on macOS

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