Shulou(Shulou.com)06/02 Report--

The upgrade of the deployment package is often encountered in the reading guide, which leads to the need to change the jdk version. Let's talk about it next.

Original jdk7 location: / usr/java/jdk1.7.0_80

New jdk8 location: / usr/java/jdk1.8.0_212

[root@localhost ~] which java/usr/bin/java [root@localhost ~] rm-f / usr/bin/java & & ln-s / usr/java/jdk1.8.0_212/bin/java / usr/bin/java [root@localhost ~] change the environment variable Change the path of the original JAVA_HOME to 1.7 to [root@localhost ~] vi / etc/profile#export JAVA_HOME=/usr/java/jdk1.7.0_80export JAVA_HOME=/usr/java/jdk1.8.0_212export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport PATH=$PATH:$JAVA_HOME/bin to make the environment variable effective [root@localhost ~] source / Etc/profile then check the current java version [root@localhost ~] java-versionjava version "1.8.0x212" Java (TM) SE Runtime Environment (build 1.8.0_212-b10) Java HotSpot (TM) 64-Bit Server VM (build 25.212-b10) Mixed mode) [root@localhost ~]

The original text is from: https://www.linuxprobe.com/centos-jdk.html

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