配置jdk环境变量，指向注册的软链地址。
# echo export JAVA_HOME=/usr/local/jdk >>~/.bash_profile # echo export PATH=$PATH:$JAVA_HOME/bin >>~/.bash_profile # source ~/.bash_profile
管理JAVA_HOME
# echo $JAVA_HOME /usr/local/jdk # java -version java version "1.8.0_111" Java(TM) SE Runtime Environment (build 1.8.0_111-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode) # javac -version javac 1.8.0_111 # update-alternatives --config jdk There are 2 choices for the alternative jdk (providing /usr/local/jdk). Selection Path Priority Status ------------------------------------------------------------ * 0 /opt/jdk1.8.0_111 300 auto mode 1 /opt/jdk1.8.0_111 300 manual mode 2 /opt/jdk1.8.0_91 200 manual mode Press <enter> to keep the current choice[*], or type selection number: 2 update-alternatives: using /opt/jdk1.8.0_91 to provide /usr/local/jdk (jdk) in manual mode # echo $JAVA_HOME /usr/local/jdk # java -version java version "1.8.0_91" Java(TM) SE Runtime Environment (build 1.8.0_91-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode) # javac -version javac 1.8.0_91
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