What is my real Java version on macOS?

Question

I use macOS Sierra. When I do:

java -version
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-468-11M4833)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-468, mixed mode)

it seems that my java version is 1.6.0 . But when I look at System Preferences I find that my version is Java 8 Update 144 . I want to use an R package that needs Java >=8.0. What have I done wrong?

Answer 1

在命令行中找到的Java是使用命令行时用于编译的Java，首先，尝试export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)然后使用java -version检查是否显示了正确的版本。重新安装最新的Java并再次运行命令