设置Mac系统JAVA_HOME

Alan

Alan

Maintainer of blog

原文

设置Mac系统的JAVA_HOME环境变量:

  1. 打开终端
  2. 编辑 ~/.bash_profile
  3. 新增一行内容 export JAVA_HOME=$(/usr/libexec/java_home)
  4. 执行 source .bash_profile
  5. 测试: echo $JAVA_HOME

以下是原文#

In this tutorial, we show you how to set $JAVA_HOME environment variable on latest or older Mac OSX.

1. Mac OSX 10.5 or later#

In Mac OSX 10.5 or later, Apple recommends to set the $JAVA_HOME variable to /usr/libexec/java_home, just export $JAVA_HOME in file ~/.bash_profile or ~/.profile.

$ vim .bash_profile
export JAVA_HOME=$(/usr/libexec/java_home)
$ source .bash_profile
$ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home

Why /usr/libexec/java_home?#

This java_home can return the Java version specified in Java Preferences for the current user. For examples,

/usr/libexec/java_home -V
Matching Java Virtual Machines (3):
1.7.0_05, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
1.6.0_41-b02-445, x86_64: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
1.6.0_41-b02-445, i386: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

This Mac OSX has three JDK installed.

##return top Java version
$ /usr/libexec/java_home
/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
## I want Java version 1.6
$ /usr/libexec/java_home -v 1.6
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Ref: https://www.mkyong.com/java/how-to-set-java_home-environment-variable-on-mac-os-x/