Java environment variable configuration on Mac

First, write at the beginning

Playing JDK on Mac is slightly different from windows. Mac is a UNIX-style system, so configuration files are hierarchical.

The following will build the blog from the lookup of the environment variable, the configuration of the environment variable (grading), and how to switch the currently used JDK three types of operations

Second, the actual operating record

(1) Java_home Search

The main method is the client command Echo $JAVA _home

Occasionally the command which Java(which command is used to find the source of the command in Linux $path)

Of course, you can also use /usr/libexec/java_home-v to view the installation and version details of the JDK, similar to or equivalent to java-version

(2) environment variable configuration

There are four ways to configure environment variables

But the commands that are executed are

　　　　　　Export Java_home=xxxxxx

Export class_path= "$JAVA _home/lib"

Export Path= ". $PATH: $JAVA _home/bin"

(a) configured as a system level, available to all users

　　　　　　Vi/etc/profile

Add the above three sentences to the document export

and use source/etc/profile to make it effective immediately.

(b) configured as a system level, valid for the current user

　　　　　　VI ~/.bash_profile

Add the above three sentences to the document export

Then use the source ~/.bash_profile to make it effective immediately.

(c) Console processing, immediate effect, closing session immediately invalid

Perform the above three export directly on the console

Note:

The export settings performed by the console are only valid for the current bash login session. This is present in memory and does not write files.

Extended Learning

mac modifies Java version

sudo vim/etc/.bashrc
Inside Plus
Export Java_home=java Path
Export path= $JAVA _home/bin: $PATH

Save Close
sudo source/etc/bashrc

Refer to: 78546354

Reference Source:

Java_home Find

Https://www.cnblogs.com/albert1017/p/4739594.html

Configure Java_home

http://blog.csdn.net/caiwenfeng_for_23/article/details/44243083

Http://blog.sina.com.cn/s/blog_7d1c5c8601015ppr.html

Https://www.cnblogs.com/SnowingYXY/p/6723019.html

Tomcat "Djava endorsed dirs=" error message appears

Http://www.blogjava.net/shangaijun/archive/2007/07/31/133485.html

　　

Jekins Configuring the JDK

https://www.jianshu.com/p/d8d1d72d0248

Java environment variable configuration on Mac