package gui;

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class DivisibleBy3 implements ActionListener {
	JFrame frame;
	JPanel contentPane;
	JLabel enterLabel;
	JLabel divisibilityLabel;
	JButton button;
	JTextField integerInput;

	String divisible = "";

	public DivisibleBy3 () {
		frame = new JFrame("DivisibleBy3");

		contentPane = new JPanel();
		contentPane.setLayout(new
			GridLayout(2, 2, 0, 5));

		enterLabel = new JLabel("Enter an integer.");
		divisibilityLabel = new JLabel();

		button = new JButton("Check");
		button.addActionListener(this);

		integerInput = new JTextField();

		frame.setContentPane(contentPane);

		contentPane.add(enterLabel);
		contentPane.add(integerInput);
		contentPane.add(button);
		contentPane.add(divisibilityLabel);

		frame.setSize(400, 400);
		frame.setVisible(true);
	}

	 public void actionPerformed(ActionEvent event) {
		String eventName = event.getActionCommand();

		if (eventName.equals("Check")) {
			int number;

			String integer = integerInput.getText();
			number = Integer.parseInt(integer);

			if ((number % 3) == 0) {
				String divisible = "";
				divisibilityLabel.setText("Number is " + divisible + " divisible by 3.");
			} else {
			String divisible = "not";
			divisibilityLabel.setText("Number is " + divisible + " divisible by 3.");
			}
		}
	}

	private static void runGUI () {
		JFrame.setDefaultLookAndFeelDecorated(true);

		DivisibleBy3 bibba = new DivisibleBy3 ();
	}

	public static void main(String[] args) {

		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				runGUI();
			}
		});
	}
}