The MAC system installs java and configures environment variables

MAC Configuring java Environment Variables

1. List all Java version information

/usr/libexec/java_home -V

2. Modify the. bash_profile file

cd ~

touch .bash_profile

vi .bash_profile

3. Configure JDK environment variable content and enter wq to save

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home #jdk Installation path   
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

4. Update the configuration file

source .bash_profile

5. View the environment variable JDK version

java -version

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