How to install JDK and set environment variables in Linux (this article is enough)

1. Check the number of Linux bits

Check whether Linux is 32-bit or 64-bit, which affects the version of JDK you need to download

Enter the command in Linux:

uname -a

If it is a 64-bit machine, it will output x86_64

2. Download JDK

Download address: https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html

Corresponding to step 1, download the 64-bit version of linx

3. Install JDK

Upload the downloaded jdk to linux and unzip the compressed file

tar -zxvf jdk-11.0.6_linux-x64_bin.tar.gz

4. Set environment variables

Modify the /etc/profile file

vim /etc/profile, add the following content:

export JAVA_HOME=/usr/local/jdk/jdk-11.0.6 #Change to the installation path of jdkexport CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH

source /etc/profile to make the environment variables effective

5. Test results

Enter the command in Linux:

[root@localhost local]# java -version
java version "11.0.6" 2020-01-14 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.6+8-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.6+8-LTS, mixed mode)

Seeing the above results, it means that jdk is installed successfully

Summarize

The above is the tutorial on how to install JDK in Linux and set environment variables introduced by the editor. I hope it will be helpful to everyone!