Mac development environment

1, JDK installation path:

View JDK path command: / usr / libexec / -V JAVA_HOME 

default JDK1. 6 (comes with the Apple JDK) path: / System / Library / the Java / JavaVirtualMachines / 1.6 . 0 .jdk / Contents / Home 

. The default JDK1 7 , 1.8 (the Oracle) Home:. / Library / the Java / JavaVirtualMachines / jdk1 8 .0_241.jdk / Contents / Home

 

2, the environment variable configuration

Create a configuration file: 
$ Touch .bash_profile 

open the configuration file: 
$ Open -e .bash_profile 

configuration files into content: 
JAVA_HOME = / Library / the Java / JavaVirtualMachines / the JDK-11.jdk / Contents / Home 
the PATH = $ JAVA_HOME / bin: $ the PATH :. 
the CLASSPATH = $ JAVA_HOME / lib / tools.jar: $ JAVA_HOME / lib / dt.jar :. 
Export JAVA_HOME 
Export the PATH 
Export the CLASSPATH

 configuration files take effect: 
$ Source .bash_profile

 to see whether the configuration take effect: 
$ echo $ JAVA_HOME

 view JDK version information : 
$ -version the Java 

references: https: //www.jianshu.com/p/bd912e2d40f3