1. 下载地址

http://jdk.java.net/19/

https://jdk.java.net/archive/

https://www.oracle.com/java/technologies/downloads

2. 环境变量设置

~/.bash_profile
#JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export JAVA_HOME
export PATH
export CLASSPATH