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查看安装了那些系统

/usr/libexec/java_home -V

例如

Mac ~ % /usr/libexec/java_home -V
Matching Java Virtual Machines (3):18.0.1.1 (x86_64) "Oracle Corporation" - "Java SE 18.0.1.1" /Library/Java/JavaVirtualMachines/jdk-18.0.1.1.jdk/Contents/Home17.0.12 (x86_64) "Oracle Corporation" - "Java SE 17.0.12" /Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home1.8.0_382 (x86_64) "Amazon" - "Amazon Corretto 8" /Users/wangpeijian/Library/Java/JavaVirtualMachines/corretto-1.8.0_382/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-18.0.1.1.jdk/Contents/Home

在终端中运行以下命令，这将设置 JAVA_HOME 环境变量为 Java 17：

export JAVA_HOME=$(/usr/libexec/java_home -v 17)
确认切换是否成功，运行：
java -version