import java.util.StringTokenizer;

import javax.swing.JOptionPane; // for GUI I/O

public class UsingGUI {

	public static void main(String[] args) {
		
		String item = JOptionPane.showInputDialog(null, "Enter your age",
				"A Simple Program", JOptionPane.QUESTION_MESSAGE);

		StringTokenizer tokens = new StringTokenizer(item);
		
		int entered = Integer.parseInt(tokens.nextToken());

		// display the message
		JOptionPane.showMessageDialog(null, "I'm not sure you are " + entered
				+ "!", "Danger", JOptionPane.ERROR_MESSAGE);

		// exit the program
		System.exit(0);

	} // end of main method

} // end of class UsingGUI