Openjdk install on centos7

This article demonstrates how to install openjdk on CentOS7.

1 Ready to work#

1.1 View the installable version###

$ yum -y list java-1.8*
# List currently available installation versions
Available Packages
java-1.8.0-openjdk.i686                                                                                                1:1.8.0.171-7.b10.el7                                                                           updates
java-1.8.0-openjdk.x86_64                                                                                              1:1.8.0.171-7.b10.el7                                                                           updates
............                                                                          
java-1.8.0-openjdk-devel.i686                                                                                          1:1.8.0.171-7.b10.el7                                                                           updates
java-1.8.0-openjdk-devel.x86_64                                                                                        1:1.8.0.171-7.b10.el7                                                                           updates
java-1.8.0-openjdk-devel-debug.i686                                                                                    1:1.8.0.171-7.b10.el7                                                                           updates
java-1.8.0-openjdk-devel-debug.x86_64                                                                                  1:1.8.0.171-7.b10.el7                                                                           updates

1.2 Determine which version to install###

For example: java-1.8.0-openjdk

2 Install openjdk

2.1 Install version 1.8###

$ yum install java-1.8.0-openjdk  java-1.8.0-openjdk-devel

2.2 View installation location###

$ rpm -ql java-1.8.0-openjdk

2.3 Set /etc/profile

$ vi /etc/profile
# Add the following at the end of the file
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.****export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

2.4 Effective immediately###

$ source /etc/profile

2.5 Check the installation###

$ java -version

If the installation is successful, it will display:

openjdk version "1.8.0_161"
OpenJDK Runtime Environment(build 1.8.0_161-b14)
OpenJDK 64-Bit Server VM(build 25.161-b14, mixed mode)

**Remarks: ** Installing openjdk, when using the encryption and decryption functions of Jhipster-Registry, will simplify a little work, I will sort out the instructions in related articles.