在macOS中同时安装jdk8.9.11.12并自由切换 在macOS中安装jdk，并查看是否安装成功打开根目录下的隐藏文件.bash_profile进行环境配置执行source命令生效使用jdk？实现终端命令的自由切换
在macOS中安装jdk，并查看是否安装成功 MacdeMacBook-Pro:~ mac$ /usr/libexec/java_home -VMatching Java Virtual Machines (4): 12.0.2, x86_64:"Java SE 12.0.2"/Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Home 11.0.4, x86_64:"Java SE 11.0.4"/Library/Java/JavaVirtualMachines/jdk-11.0.4.jdk/Contents/Home 9.0.4, x86_64:"Java SE 9.0.4"/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home 1.8.0_221, x86_64:"Java SE 8"/Library/Java/JavaVirtualMachines/jdk1.8.0_221.jdk/Contents/Home/Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Home 打开根目录下的隐藏文件.bash_profile进行环境配置
打开.bash_profile，没有的话创建
写入以下内容
# added by Anaconda3 5.2.0 installerexport JAVA_8_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_221.jdk/Contents/Homeexport JAVA_9_HOME=/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Homeexport JAVA_11_HOME=/Library/Java/JavaVirtualMachines/jdk-11.0.4.jdk/Contents/Homeexport JAVA_12_HOME=/Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Homealias jdk8="export JAVA_HOME=$JAVA_8_HOME" #编辑一个命令jdk8，输入则转至jdk1.8alias jdk9="export JAVA_HOME=$JAVA_9_HOME" #编辑一个命令jdk9，输入则转至jdk1.9alias jdk11="export JAVA_HOME=$JAVA_11_HOME" #编辑一个命令jdk11，输入则转至jdk1.11alias jdk12="export JAVA_HOME=$JAVA_12_HOME" #编辑一个命令jdk12，输入则转至jdk1.12export JAVA_HOME=`/usr/libexec/java_home` #最后安装的版本，这样当自动更新时，始终指向最新版本 执行source命令生效 MacdeMacBook-Pro:~ mac$ source .bash_profile 使用jdk？实现终端命令的自由切换 MacdeMacBook-Pro:~ mac$ jdk9MacdeMacBook-Pro:~ mac$ java -versionjava 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)MacdeMacBook-Pro:~ mac$ jdk11MacdeMacBook-Pro:~ mac$ java -versionjava version "11.0.4" 2019-07-16 LTSJava(TM) SE Runtime Environment 18.9 (build 11.0.4+10-LTS)Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.4+10-LTS, mixed mode)MacdeMacBook-Pro:~ mac$ jdk8MacdeMacBook-Pro:~ mac$ java -versionjava version "1.8.0_221"Java(TM) SE Runtime Environment (build 1.8.0_221-b11)Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)MacdeMacBook-Pro:~ mac$ jdk12MacdeMacBook-Pro:~ mac$ java -versionjava version "12.0.2" 2019-07-16Java(TM) SE Runtime Environment (build 12.0.2+10)Java HotSpot(TM) 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing) 94294229
