echo %JAVA_HOME% If empty, add it manually via System Properties > Environment Variables.
Java 17 is a Long-Term Support (LTS) release, meaning it comes with several years of stability, security updates, and bug fixes. Whether you're a beginner setting up your first development environment or a professional maintaining a production system, installing Java 17 is straightforward. installing java 17
sudo apt update sudo apt install openjdk-17-jdk Many Java tools (Maven, Gradle, Tomcat) rely on the JAVA_HOME variable. The Windows .msi installer often sets this automatically. Check using: echo %JAVA_HOME% If empty, add it manually via
Add this to your ~/.bashrc , ~/.zshrc , or ~/.profile file: echo %JAVA_HOME% If empty