$ sudo apt search jdk-headless
$ sudo apt install default-jdk-headless
$ sudo apt install openjdk-8-jdk-headless
$ sudo apt install openjdk-11-jdk-headless
$ sudo apt install openjdk-17-jdk-headless
$ sudo apt install openjdk-18-jdk-headless
$ sudo apt install openjdk-19-jdk-headless
$ sudo apt install openjdk-20-jdk-headless
$ sudo apt install openjdk-21-jdk-headless
$ update-java-alternatives --list
$ sudo update-java-alternatives --set /path/to/java/version

$ npm install -g @ionic/cli native-run cordova cordova-res cordova jshint
$ npm init @capacitor/app