1、官网下载JDK8和JDK11安装包，安装后打开bash,可以看到2个版本安装成功
XXX-MacBook-Pro:~ chunyanzhang$ cd /Library/Java/JavaVirtualMachines XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ ls -al total 0 drwxr-xr-x 4 root wheel 128 12 18 00:18 . drwxr-xr-x 4 root wheel 128 11 15 17:25 .. drwxr-xr-x 3 root wheel 96 11 15 17:25 jdk-11.0.2.jdk drwxr-xr-x 3 root wheel 96 12 18 00:18 jdk1.8.0_271.jdk
2、编辑环境变量
xport JAVA_11_HOME=/Library/Java/JavaVirtualMachines/jdk-11.0.2.jdk/Contents/Home export JAVA_8_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_271.jdk/Contents/Home alias jdk8='export JAVA_HOME=$JAVA_8_HOME' alias jdk11='export JAVA_HOME=$JAVA_11_HOME' export JAVA_HOME=$JAVA_8_HOME export ANDROID_HOME=/Users/chunyanzhang/Library/Android/sdk export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools alias python="/Library/Frameworks/Python.framework/Versions/3.11/bin/python3"
3、：wq! 保存并退出
4、执行使配置的环境变量生效 source ～/.bash_profile
5、查看当前jdk版本，使用命令： java -version
XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ java -version java version "1.8.0_271" Java(TM) SE Runtime Environment (build 1.8.0_271-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.271-b09, mixed mode)
6、在jdk8和jdk11之间切换
默认：jdk8
1）从jdk8切换到jdk11
XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ jdk11 XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ java -version java version "11.0.2" 2019-01-15 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.2+9-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.2+9-LTS, mixed mode)
2) 从jdk11切换到jdk8
XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ jdk8 XXX-MacBook-Pro:JavaVirtualMachines chunyanzhang$ java -version java version "1.8.0_271" Java(TM) SE Runtime Environment (build 1.8.0_271-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.271-b09, mixed mode)
标签：JDK1.8,12,Java,jdk,chunyanzhang,JDK11,JavaVirtualMachines,HOME,JAVA From： https://www.cnblogs.com/xiaoyanguniang/p/16989896.html