CentOS에서 alternatives 이용한 java version 관리

alternatives --install /usr/bin/java java /opt/jdk/1.8.0_131/bin/java 2
alternatives --config java

#There is 1 program that provides 'java'.
# Selection    Command
#-----------------------------------------------
#*+ 1           /opt/jdk1.8.0_131/bin/java
#Enter to keep the current selection[+], or type selection number:
#javac와 jar 명령어 경로도 alternatives 적용 권장
#At this point JAVA 8 has been successfully installed on your system. 
#We also recommend to setup javac and jar commands path using alternatives

alternatives --install /usr/bin/jar jar /opt/jdk/1.8.0_131/bin/jar 2
alternatives --install /usr/bin/javac javac /opt/jdk/1.8.0_131/bin/javac 2
alternatives --set jar /opt/jdk/1.8.0_131/bin/jar
alternatives --set javac /opt/jdk/1.8.0_131/bin/javac