Manually Install JDK on Linux

This article applies to:

• Platform(s): Xubuntu Linux
• Java version: 22.0.2

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Download

1. Go to https://jdk.java.net and download the JDK version you want. For now, I choose JDK 22, and pick the download link for Linux/64 build, tar.gz format of JDK 22.0.2 General-Availability Release. So my downloaded file is openjdk-22.0.2_linux-x64_bin.tar.gz.
2. Check the download file size and sha256 hash string to make sure that you have downloaded the full, uncorrupted file. For example, the jdk.java.net site reports that the Linux/x64 build file is 201996264 bytes, and the SHA256 hash string is 41536f115668308ecf4eba92aaf6acaeb0936225828b741efd83b6173ba82963

   xubuntu:~/share/download/java$ ls -l
   total 197264
   -rwxrwxrwx 1 root root 201996264 Aug 26 14:45 openjdk-22.0.2_linux-x64_bin.tar.gz
   xubuntu:~/share/download/java$ sha256sum openjdk-22.0.2_linux-x64_bin.tar.gz 
   41536f115668308ecf4eba92aaf6acaeb0936225828b741efd83b6173ba82963 openjdk-22.0.2_linux-x64_bin.tar.gz
   

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Install

1. I like to extract the JDK content to a temporary folder before moving/copying it to the default folder of /usr/lib/jvm.

   xubuntu:~/share/download/java$ mkdir ~/temp/jdk
   xubuntu:~/share/download/java$ tar -xvzf openjdk-22.0.2_linux-x64_bin.tar.gz -C ~/temp/jdk
   jdk-22.0.2/bin/jar
   jdk-22.0.2/bin/jarsigner
   jdk-22.0.2/bin/java
   jdk-22.0.2/bin/javac
   ... omitted-output ...
   jdk-22.0.2/lib/src.zip
   jdk-22.0.2/lib/tzdb.dat
   jdk-22.0.2/release
   xubuntu:~/share/download/java$ cd ~/temp/jdk
   xubuntu:~/temp/jdk$ ls -l
   total 4
   drwxrwxr-x 8 h0ward h0ward 4096 Aug 26 15:18 jdk-22.0.2
   

2. Move the new JDK content to /usr/lib/jvm

   xubuntu:~/temp/jdk$ sudo mkdir /usr/lib/jvm
   xubuntu:~/temp/jdk$ sudo mv jdk-22.0.2/ /usr/lib/jvm
   xubuntu:~/temp/jdk$ ls -l /usr/lib/jvm
   total 4
   drwxrwxr-x 8 h0ward h0ward 4096 Aug 26 15:18 jdk-22.0.2
   

Configure

1. Update environment variables to point to the newly installed JDK by editing the /etc/environment file.

   xubuntu:~/temp/jdk$ sudo nano /etc/environment
   

2. Add JAVA_HOME variable, and JDK bin to PATH.

   JAVA_HOME="/usr/lib/jvm/jdk-22.0.2"
   PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/usr/lib/jvm/jdk-22.0.2/bin"