This program prints a JOptionPane window with a message

JOptionInstallationDialog.java

/***********************************************
* JOptionInstallationDialog.java
* Aaron P. Clark
*
* This program prints a JOptionPane window with a message
***********************************************/

import javax.swing.JOptionPane;

public class JOptionInstallationDialog
{
	public static void main(String[] args)
	{
		JOptionPane.showMessageDialog(null,
			"Before Starting the installation. " +
			"shut down all applications.");
	} // end main
} // end class InstallationDialog