如何在macOS上设置或更改默认Java(JDK)版本? [英] How to set or change the default Java (JDK) version on macOS?

问题描述

如何在Mac上更改Java的默认版本?

How can you change the default version of Java on a mac?

推荐答案

首先运行/usr/libexec/java_home -V ，它将输出类似以下内容的内容:

First run /usr/libexec/java_home -V which will output something like the following:

Matching Java Virtual Machines (3):
1.8.0_05, x86_64:   "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home
1.6.0_65-b14-462, x86_64:   "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
1.6.0_65-b14-462, i386: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home

选择您想要的默认版本(出于参数目的， 1.6.0_65-b14-462 )，然后:

Pick the version you want to be the default (1.6.0_65-b14-462 for arguments sake) then:

export JAVA_HOME=`/usr/libexec/java_home -v 1.6.0_65-b14-462`

或者您可以仅指定主要版本，例如:

or you can specify just the major version, like:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

现在，当您运行 java -version 时，您将看到:

Now when you run java -version you will see:

java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)

将 export JAVA_HOME…行添加到Shell的初始化文件中.

Add the export JAVA_HOME… line to your shell’s init file.

对于Bash(如 antonyh 所述):

For Bash (as stated by antonyh):

export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)

对于鱼类(如ormurin所述)

For Fish (as stated by ormurin)

set -x JAVA_HOME (/usr/libexec/java_home -d64 -v1.8)

更新.zshrc文件应该可以:

Updating the .zshrc file should work:

nano ~/.zshrc

export JAVA_HOME=$(/usr/libexec/java_home -v 1.8.0)

按CTRL + X退出编辑器按Y保存更改

Press CTRL+X to exit the editor Press Y to save your changes

source ~/.zshrc
echo $JAVA_HOME
java -version

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