import javax.swing.*;
public class PackageDemo extends JFrame{
		public PackageDemo(){
		super ("My Package");
		JOptionPane.showMessageDialog(new JFrame(), " This is a Dialog Box component of swing ","My Message",JOptionPane.INFORMATION_MESSAGE);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	public static void main(String[] args){
		PackageDemo obj=new PackageDemo();
	}
}