import javax.swing.JOptionPane;

// The 'JOptionPane' class contains numerous
// static methods that can be called directly;
// the dialog boxes produced by these methods
// can be extensively customized

// For extensive information on the 'JOptionPane' class, see
// https://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html
public class JOptionPaneDemo
{
	public static void main(String[] args)
	{
		// ============================================================
		// Basic string input
		String name = JOptionPane.showInputDialog("What is your name?");
		if (name != null && !name.trim().equals(""))
			JOptionPane.showMessageDialog(null, "You gave your name as:  " + name);
		else
			JOptionPane.showMessageDialog(null, "You did not give your name!");

		// ============================================================
		// Numerical input with a loop
		boolean badInput;
		int age = 0;
		do
		{
			badInput = false;
			try
			{
				age = Integer.parseInt(JOptionPane.showInputDialog("How old are you?"));
			}
			catch (Exception error)
			{
				JOptionPane.showMessageDialog(null, "You need to enter an integer.\nPlease try again.");
				badInput = true;
			}
		} while (badInput);
		JOptionPane.showMessageDialog(null, "You are " + age + " years old.");

		// ============================================================
		// A customized Confirmation Dialog Box and Message Dialog Box; note
		// that the message type for the Message Dialog box determines which
		// icon is displayed
		int answer = JOptionPane.showConfirmDialog(null, "Do you like this demo program?",
						 "Question from Dave", JOptionPane.YES_NO_OPTION);
		if (answer == 0)
			JOptionPane.showMessageDialog(null, "You answered YES.", "Thanks for the feedback!",
													JOptionPane.PLAIN_MESSAGE);
		if (answer == 1)
			JOptionPane.showMessageDialog(null, "You answered NO.", "Thanks for the feedback!",
													JOptionPane.PLAIN_MESSAGE);
		if (answer == 2 || answer == -1)
			JOptionPane.showMessageDialog(null, "You did not answer the question!", "No Feedback Given",
													JOptionPane.ERROR_MESSAGE);

		// ============================================================
		// An extremely customized Input Dialog Box
		String[] colors = new String[] {"red", "green", "blue", "yellow"};
		String choice = (String)JOptionPane.showInputDialog(null, "What is your favorite color?",
							 "Color Chooser", JOptionPane.INFORMATION_MESSAGE, null, colors, colors[0]);
		if (choice != null)
			JOptionPane.showMessageDialog(null, "I agree that " + choice + " is a very nice color.");
		else
			JOptionPane.showMessageDialog(null, "I'm sad that you didn't choose a color.");

		System.exit(0);
	}
}