JDK Installation and Deployment

It is recommended to install JDK 11.

1. Dependency Environment

For open-source JDK, font library support is required. If it is already present on the Linux system, there's no need to install it.

yum install fontconfig
fc-cache --force
fc-cache -f

2. Extract JDK Installation Package

tar -zxvf jdk-11.0.9_linux-x64_bin.tar.gz -C /usr/local/

3. Configure Environment Variables

Open the profile configuration file:

vi /etc/profile

Add the following configurations at the end of the file:

export JAVA_HOME=/usr/local/jdk-11.0.9
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

Refresh the configuration to make it effective:

source /etc/profile

4. Verification

Check the installed Java version:

java -version

Please note that when copying and pasting these commands, ensure that the formatting remains consistent, and adjust paths and filenames as needed for your system.