//Inheritance
MusicVideo item3 = new MusicVideo("Music", 80, "Lil Wayne", "R&B");
item3.show();

class MusicVideo extends VideoTape {
	String artistN;
	String category;

	public MusicVideo(String ttl, int lngth, String artistN, String category) {
	super(ttl, lngth);
	this.artistN = artistN;
	this.category = category;
	}

	public void show() {
		super.show();
		System.out.println("artist : " + artistN + " " + "\ncategory : "+ category);
	}
}

//POLYMORPH
Scanner sc = new Scanner(System.in);
		Saloon[] s1 = new Saloon[3];
for (int i = 0; i < s1.length; i++) {
  	s1[i] = new BodyTreatment(customerNumber, customerName, member, date, treatmentType);
    	s1[i] = new HairTreatment(customerNumber, customerName, member, date, rebonding, cutting, washing, dyeing);
}
for (int i = 0; i < s1.length; i++) {
			s1[i].show();
			System.out.println("Treatment Cost \t: RM " + s1[i].computePayment() + "\n========================================\n");
		}
		sc.close();


//GUI

package ex2;
import javax.swing.*;
import javax.swing.event.ChangeEvent;

import java.awt.*;
import java.awt.event.*;
import java.io.*;

class MainMethod extends JFrame implements ActionListener{
	// Default frame width
	private static final int FRAME_WIDTH = 350;
	// Default frame height
	private static final int FRAME_HEIGHT = 200;
	// x coordinate of the frame default original point
	private static final int FRAME_X_ORIGIN = 150;
	// y coordinate of the frame default original point
	private static final int FRAME_Y_ORIGIN = 250;
	/**
	 * The Swing button
	 */
	private JButton btnCalculate;
	private JButton btnClear;
	/**
	 * The JTextField for the user to enter the numbers
	 */
	private JTextField txtNum1;
	private JTextField txtNum2;
	private JTextField txtTotal;

	//Checkbox
	private JCheckBox btnAlmond;
	private JCheckBox btnMazola;

	//Radio button
	private JRadioButton delivery;
	private JRadioButton noDelivery;


	/**
	 * The JLabel for prompting the user
	 */
	private JLabel lblNum1;


	private JLabel lblNum2;
	private JLabel lblTotal;
	//------------------------------------
	// Main Method
	//------------------------------------
	public static void main(String[] args) throws IOException {
		MainMethod calculator = new MainMethod();
		calculator.setVisible(true);
	}
	//------------------------------------
	// Constructors
	//------------------------------------
	public MainMethod()
	{
		Container contentPane;
		//set the frame properties
		setSize (FRAME_WIDTH, FRAME_HEIGHT);
		setResizable(true);
		setTitle ("Mini Calculator");
		setLocation (FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
		contentPane = getContentPane();
		contentPane.setLayout(new GridLayout(6,2));

		JMenuBar mb = new JMenuBar();
		setJMenuBar(mb);
		JMenu fileMenu = new JMenu("File", false);
		fileMenu.add(new JMenuItem("new"));
		fileMenu.add(new JMenuItem("open"));
		fileMenu.addSeparator();
		fileMenu.add(new JMenuItem("print"));
		fileMenu.add(new JMenuItem("exit"));
		fileMenu.addSeparator();

		JMenu helpMenu = new JMenu("Help", true);
		helpMenu.add(new JCheckBoxMenuItem("Check it"));
		JMenu softwareHelpSubMenu = new JMenu("Software");
		JMenu hardwareHelpSubMenu = new JMenu("Hardware");
		helpMenu.add(softwareHelpSubMenu);
		helpMenu.add(hardwareHelpSubMenu);
		softwareHelpSubMenu.add(new JMenuItem("Unix"));
		softwareHelpSubMenu.add(new JMenuItem("NT"));
		softwareHelpSubMenu.add(new JMenuItem("Win95"));
		hardwareHelpSubMenu.add(new JMenuItem("MacOS"));

		mb.add(fileMenu);
		mb.add(helpMenu);


		JPopupMenu jPopupMenu = new JPopupMenu();
		JPopupMenu(new JMenuItem("New"));
		JPopupMenu(new JMenuItem("Open"));
		jPopupMenu.show(lblNum1, 500, 500);



		// add the labels
		lblNum1 = new JLabel();
		lblNum1.setText("Types");
		lblNum1.setSize(150, 25);
		lblNum2 = new JLabel();
		lblNum2.setText("Quantity/Box");
		lblNum2.setSize(150, 25);
		lblTotal = new JLabel();
		lblTotal.setText("Total Price:");
		lblTotal.setSize(150, 25);

		//add check box
		btnAlmond = new JCheckBox("Almond London");
		btnMazola = new JCheckBox("Mazola Cookies");


		//add radio button
		delivery = new JRadioButton("Delivery");
		delivery.setSelected(true);
		noDelivery = new JRadioButton("No Delivery");
		noDelivery.setSelected(true);

		// add the text fields
		txtNum1 = new JTextField();
		txtNum1.setColumns(15);
		txtNum1.setFont(new Font("Courier", Font.PLAIN, 14));
		txtNum2 = new JTextField();
		txtNum2.setColumns(15);
		txtNum2.setFont(new Font("Courier", Font.PLAIN, 14));
		txtTotal = new JTextField();
		txtTotal.setColumns(27);
		txtTotal.setFont(new Font("Courier", Font.PLAIN, 14));

		//create and place buttons on the frame
		btnCalculate = new JButton("CALCULATE");
		btnClear = new JButton("CLEAR");

		//add the objects to the content pane
		contentPane.add(lblNum1);
		contentPane.add(lblNum2);

		contentPane.add(btnAlmond);
		contentPane.add(txtNum1);

		contentPane.add(btnMazola);
		contentPane.add(txtNum2);


		//Radio button added in group
		ButtonGroup group = new ButtonGroup();
		delivery = new JRadioButton("DELIVERY ");
		delivery.setSelected(true);
		noDelivery = new JRadioButton("NO DELIVERY ");
		group.add(delivery );
		group.add(noDelivery );
		contentPane.add(delivery);
		contentPane.add(noDelivery);


		contentPane.add(lblTotal);
		contentPane.add(txtTotal);

		//add the button objects to the content pane
		contentPane.add(btnCalculate);
		contentPane.add(btnClear);


		//register this frame as an action listener of the buttons
		txtNum1.addActionListener(this);
		txtNum2.addActionListener(this);
		btnAlmond.addActionListener(this);
		btnMazola.addActionListener(this);
		btnCalculate.addActionListener(this);
		btnClear.addActionListener(this);
		setDefaultCloseOperation( EXIT_ON_CLOSE);
	}


	private void JPopupMenu(JMenuItem jMenuItem) {
		// TODO Auto-generated method stub

	}
	public void actionPerformed(ActionEvent event) {
		if (event.getSource() == btnCalculate ) {
			double total = 0.0;
			int almond = Integer.parseInt(txtNum1.getText());
			int mazola = Integer.parseInt(txtNum2.getText());
			if (delivery.isSelected() == true) {
				if (btnAlmond.isSelected() == true) {
					total += (20 * almond);
				}
				if (btnMazola.isSelected() == true) {
					total += (15 * mazola);
				}

				txtTotal.setText("RM " + (total + 5));

			} else if (noDelivery.isSelected() == true) {
				if (btnAlmond.isSelected() == true) {
					total += (20 * almond);
				}
				if (btnMazola.isSelected() == true) {
					total += (15 * mazola);
				}
				System.out.println("here");
				txtTotal.setText("RM " + total );
			}
		} else if ( event.getSource() == btnClear) {
			txtNum1.setText(" " + 0);
			txtNum2.setText(" " + 0);
			txtTotal.setText(" " + 0);
		}
	} // end of ActionPerformed
}