How to install openJDK on CentOS

This article demonstrates the installation of openJDK in CentOS
This article is a personal technical sharing, if there are any errors or omissions, please Get in touch and make changes.
Note: Server operation is performed by the rootuser. If there is a permission problem, please switch to the rootuser or grant the relevant permissions to the current user. This article will not go into details

DownloadopenJDK

wget Download

wget https://download.java.net/java/GA/jdk13.0.2/d4173c853231432d94f001e99d882ca7/8/GPL/openjdk-13.0.2_linux -x64_bin.tar.gz

Manual download-upload to the server (when the server cannot connect to the Internet or the download is slow)

openJDK official website Or click directly to download openjdk-13.0.2_linux-x64_bin.tar.gz)

Check whether openJDK or other versions of JDK are installed on the server, and uninstall

Executerpm -qa |grep javaCheck whether JDK is installed on the server, or executejava,javac,java -version

Uninstall JDK on the server

Install openJDK

Prepare openJDK on the server. According to personal habits, copy openJDK to the specified directory. Some people like to install it in/usr/local/srcdirectory, some people like to install it in the/optdirectory

Copy the installation package to the installation path

Installation package decompression

Execute the installation package decompression commandtar -zxvf openjdk-13.0.2_linux-x64_bin.tar.gz

Configure environment variables

Executevim /etc/profile, configure environment variables

Configuration JAVA_HOME: export JAVA_HOME=/usr/local/src/jdk-13.0.2
Add the java bin directory to the system path: export PATH=$PATH:${JAVA_HOME}/bin

Reload environment
source /etc/profile

Verify

java -version