Steps of Java version switch:
Under some situations, we need to switch from the latest java version (e.g. java11) to olders and more stable versions (e.g java8) to compile with some libraries.
Step1:
- Add the target java version from Oracle to local computer and check in terminal
$ /usr/libexec/java_home -V
- And make sure there are two or more versions in your local computer
$ cd /Library/Java/JavaVirtualMachines
$ ls
Step2:
- Add Alias to the file ~/.bash_profile（if Zsh，edit ~/.zshrc）
# JDK 11
export JAVA_11_HOME="/Library/Java/JavaVirtualMachines/11.0.1.jdk/Contents/Home"
# JDK 8
export JAVA_8_HOME="/Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home"
export JAVA_HOME=$JAVA_8_HOME #default JDK 8
#alias to switch java version
alias jdk11="export JAVA_HOME=$JAVA_11_HOME"
alias jdk8="export JAVA_HOME=$JAVA_8_HOME"
- Update the file
$
source ~/.bash_profile(zsh:source ~/.zshrc)
Step3:
- Make sure the java version has been switched
- Use Alias to switch java versions
Step4:
- If use ide, make sure the ide use the correct JAVA version
Reference: https://segmentfault.com/a/1190000013131276
