import javax.swing.JOptionPane;

/**

* Steps:

*

* - compile: `javac PackagingTool.java`

* - create JAR: `jar -cfe packaging-tool-example.jar PackagingTool PackagingTool.class`

* - test JAR: `java -jar packaging-tool-example.jar`

* - create the Package: `jpackage --name pack-tool-sample --input . --main-jar packaging-tool-example.jar --main-class PackagingTool`

*

* Package will generate:

* - `dmg` on macOS

* - `msi` on Windows

* - `app` on Linux

*/

public class PackagingTool {

public static void main(String[] args) {

System.out.println("Main =)");

JOptionPane.showMessageDialog(null, "Hello world from self-contained application", null,

JOptionPane.INFORMATION_MESSAGE);

}

}