MacBook 安装jdk9.0.4,并配置运行环境

MacBook 安装jdk9[jdk-9.0.4_osx-x64_bin.dmg],并配置java运行环境

下载jdk9

/technetwork/java/javase/downloads/
选择“Accept License Agreement ”，然后点击macOS版本下载；
然后安装即可

检验Java环境以及jdk9是否安装成功

检验java环境终端输入：java -version，显示版本号
检验jdk安装是否成功：javac -version

~ » java -version
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)
~ » javac -version
javac 9.0.4
~ » 

标题Mac下查看安装的jdk目录

打开终端，输入：/usr/libexec/java_home -V
注意：输入命令参数区分大小写(-v是不对的，必须是-V)

~ » 
~ » /usr/libexec/java_home -V
Matching Java Virtual Machines (1):
    9.0.4, x86_64:	"Java SE 9.0.4"	/Library/Java/JavaVirtualMachines/jdk-9.0./Contents/Home

/Library/Java/JavaVirtualMachines/jdk-9.0./Contents/Home
~ » 

可看到jdk的安装路径为:
/Library/Java/JavaVirtualMachines/jdk-9.0./Contents/Home
配置环境变量
jdk10开始安装时会自动配置环境变量无需手动配置

标题在终端中配置环境变量

tingjun@bogon /Users/tingjun                                                    
⚡ touch .bash_profile

tingjun@bogon /Users/tingjun                                                    
⚡ open -e .bash_profile 

tingjun@bogon /Users/tingjun                                                    
⚡ source .bash_profile 

tingjun@bogon /Users/tingjun                                                    
⚡ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk-9.0./Contents/Home

tingjun@bogon /Users/tingjun                                                    
⚡ 

在open -e .bash_profile之后：
输入如下配置：
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home
PATH=$JAV{A}_{H}OME/bin:$PATH:.
CLASSPATH=$JAV{A}_{H}OME/lib/tools.jar:$JAVA_HOME/lib/:.
export JAVA_HOME
export PATH
export CLASSPATH
然后保存关闭该窗口。