Mac 找出已安裝的JDK find installed JDK

查看Mac中已安裝的JDK的方式如下。

在終端機輸入/usr/libexec/java_home -V指令即可查看Mac目前已安裝的JDK有哪些。

$ /usr/libexec/java_home -V
Matching Java Virtual Machines (1):
    1.8.0_251, x86_64:	"Java SE 8"	/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home

從上面可看出Mac中目前已裝有jdk1.8.0_251，安裝路徑為/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home。

輸入java --version檢視目前使用的Java版本。

$ java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)

• Determining the Default JDK Version on macOS
• How to set or change the default Java (JDK) version on OS X?
• Mac install JDK by Homebrew