alias java17='export JAVA_HOME=/usr/java/jdk-17.0.13 && export CLASSPATH=.:${JAVA_HOME}/lib && export PATH=${JAVA_HOME}/bin:$PATH && java -version'alias java8='export JAVA_HOME=/usr/java/jdk1.8.0_201 && export CLASSPATH=.:${JAVA_HOME}/lib && export PATH=${JAVA_HOME}/bin:$PATH && java -version'export JAVA_HOME=/usr/java/jdk1.8.0_201export TNS_ADMIN=${ORACLE_HOME}/network/adminexport JRE_HOME=${JAVA_HOME}/jreexport CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATHexport JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/binexport PATH=$PATH:${JAVA_PATH}:${ORACLE_HOME}/bin
[root@Aliyun bin]# java8java version "1.8.0_201"Java(TM) SE Runtime Environment (build 1.8.0_201-b09)Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)[root@Aliyun bin]# java17java version "17.0.13" 2024-10-15 LTSJava(TM) SE Runtime Environment (build 17.0.13+10-LTS-268)Java HotSpot(TM) 64-Bit Server VM (build 17.0.13+10-LTS-268, mixed mode, sharing)[root@Aliyun bin]# which java/usr/java/jdk-17.0.13/bin/java


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