How to install jdk in CentOS7

How to install jdk in CentOS7

1. Before installation, check whether the system comes with open-jdk

Command:

rpm -qa |grep java
rpm -qa |grep jdk
rpm -qa |grep gcj

If no information is entered, it means there is no installation. If installed, you can use rpm -qa | grep java | xargs rpm -e --nodeps to batch uninstall all files with Java. The keyword of this command is java.

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2. Then retrieve the list containing java

yum list java*

3. Select the jdk version you need to install. For example, to install 1.8 here, execute the following command:

yum install -y java-1.8.0-openjdk-devel.x86_64

Wait until the installation is completed.

4. After the installation is complete, check the installed jdk version and enter the following command:

java -version

Here you can see the jdk version information you installed. .

The jdk installed in this way will be installed under the usr/lib/jvm directory

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