JDK installation method under Mac environment

1. Version

MAC OS 10.10.3

Jdk:jdk1.8.0_40

JDK download for Mac version: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2. Unzip the JDK package to a path

/library/java/javavirtualmachines/jdk1.8.0_40.jdk/contents/home

3. Configure Environment variables

Open the user-level system environment variable profile open ~/.bash_profile (zsh open ~/.ZSHRC file is installed)

Adding configuration parameters

Export java_home= '/library/java/javavirtualmachines/jdk1.8.0_40.jdk/contents/home '

Export path= $JAVA _home/bin: $PATH

Export classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar

4. Verifying the installation results

Reboot to ensure system configuration file re-read takes effect

Terminal input: Java-version

The following information is displayed to indicate that the JDK was successfully installed:

Java Version "1.8.0_40"
Java (TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot (TM) 64-bit Server VM (build 25.40-b25, Mixed mode)

5.QA: Why configure the system's environment variables?

When using some Java commands, such as Java Javac, and so on, the local (none of the Shell's own commands) is not found, this time need to go to the declaration of the directory to find, that is, the environment variable $path the specified directory.

Therefore, for some things that need to use the command line, you need to configure environment variables, such as Mysql,maven

JDK installation method under Mac environment