Java

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class Flooring extends JFrame implements ActionListener{
        JRadioButton radioWood, radioCarpet, radioGroup;
        JLabel labelName, labelAddress, labelLength, labelWidth; 
        JTextField textName, textAddress, textLength, textWidth, textCalculateArea;
        JButton buttonCalculateArea, buttonCalculateCost, buttonSubmitOrder, buttonDisplaySummary, buttonDisplayList;
        JTextArea textAreaSummary;
        JTabbedPane tabbedPane;

public Flooring() {

        super("Flooring");

        tabbedPane = new JTabbedPane();

        //Create Customer Panel & Add To JTabbedPane
        JPanel panel1 = new JPanel(new GridLayout(5, 2, 4, 9));

        labelName = new JLabel("Name: ", SwingConstants.CENTER);
        panel1.add(labelName);
        textName = new JTextField(10);
        panel1.add(textName);

        labelAddress = new JLabel("Address: ", SwingConstants.CENTER);
        panel1.add(labelAddress);
        textAddress = new JTextField(50);
        panel1.add(textAddress);

        tabbedPane.addTab("Customer", null, panel1, "First Panel");

        //Create Size Panel & Add To JTabbedPane
        JPanel panel2 = new JPanel(new GridLayout(5, 2, 4, 9));

        radioWood = new JRadioButton("Wood");
        radioWood.setBounds(336, 157, 64, 23);
        radioWood.setSelected(false);
        panel2.add(radioWood);

        radioCarpet = new JRadioButton("Carpet");
        radioCarpet.setBounds(336, 157, 64, 23);
        radioCarpet.setSelected(false);
        panel2.add(radioCarpet);

        labelLength = new JLabel("Flooring Length: ", SwingConstants.CENTER);
        panel2.add(labelLength);
        textLength = new JTextField(10);
        panel2.add(textLength);

        labelWidth = new JLabel("Flooring Width: ", SwingConstants.CENTER);
        panel2.add(labelWidth);
        textWidth = new JTextField(10);
        panel2.add(textWidth);

        buttonCalculateArea = new JButton("Calculate Area");
        panel2.add(buttonCalculateArea);
        buttonCalculateArea.addActionListener(this);

        textCalculateArea = new JTextField();
        panel2.add(textCalculateArea);

        buttonSubmitOrder = new JButton("Submit Order");
        panel2.add(buttonSubmitOrder);
        buttonSubmitOrder.addActionListener(this);

        tabbedPane.addTab("Size", null, panel2, "Second Panel");

        //Create Order Summary Panel & Add To JTabbedPane
        JPanel panel3 = new JPanel(new GridLayout(5, 2, 4, 9));

        buttonDisplaySummary = new JButton("Display Summary");
        panel3.add(buttonDisplaySummary);
        buttonDisplaySummary.addActionListener(this);

        tabbedPane.addTab("Summary", null, panel3, "Third Panel");

        //Create Order List & Add To JTabbedPane
        JPanel panel4 = new JPanel(new GridLayout(5, 2, 4, 9));
        buttonDisplayList = new JButton("Display List");
        panel4.add(buttonDisplayList);
        buttonDisplayList.addActionListener(this);

        tabbedPane.addTab("List", null, panel4, "Third Panel");

        //Group Radio Buttons
        ButtonGroup radioGroup = new ButtonGroup();
        radioGroup.add(radioWood);
        radioGroup.add(radioCarpet);

        //Register Radio Button Action Listeners
        radioWood.addActionListener(this);
        radioCarpet.addActionListener(this);

        //Add JTabbedPane To Frame
        getContentPane().add(tabbedPane);
        setSize(270,200);
        setVisible(true);
}

public void actionPerformed(ActionEvent e) {
    if (textName.getText().equals("")){
        JOptionPane.showMessageDialog(null, "Must enter name!");
    }else
        textName.setText(textName.getText());

    if (textAddress.getText().equals("")){
        JOptionPane.showMessageDialog(null, "Must enter address!");
    }else
        textAddress.setText(textAddress.getText());

    if (radioWood.isSelected()){
        radioWood.setText(radioWood.getText());
    }else if (radioCarpet.isSelected()){
        radioCarpet.setText(radioCarpet.getText());
    }else
        JOptionPane.showMessageDialog(null, "Must choose flooring type!");

    if (textLength.getText().equals("")){
        JOptionPane.showMessageDialog(null, "Must enter length!");
    }else
        textLength.setText(textLength.getText());

    if (textWidth.getText().equals("")){
            JOptionPane.showMessageDialog(null, "Must enter width!");
    }else
            textWidth.setText(textWidth.getText());

    if (e.getSource() == buttonCalculateArea){
        int length, width, area;
        length = Integer.parseInt(textLength.getText());
        width = Integer.parseInt(textWidth.getText());
        area = length * width;
        textCalculateArea.setText(Integer.toString(area));

    if (e.getSource() == buttonSubmitOrder){
        tabbedPane.setSelectedIndex(2);

    if (e.getSource() == buttonDisplaySummary){
        int flooringPrice = 0;
        int cost;

        if (radioWood.isSelected())
            flooringPrice = 20;
        if (radioCarpet.isSelected())
            flooringPrice = 10;

        cost = flooringPrice * area;

    if (e.getSource() == buttonDisplayList){

    }
    }
    }
}
}
}

import javax.swing.JFrame;

public class FlooringTest {
    public static void main( String args[] ){
        Flooring flooring = new Flooring();
        flooring.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
    }
} 

import org.springframework.beans.factory.annotation.Autowired;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class FavoriteService {
    @Autowired
    private Users users;

    public boolean checkLogin(String username, String password) {
        return users.login(username, password);
    }


    public void addUser(String root, String rootpasswd, String username, String password) {
        if(root.equals("root")&&rootpasswd.equals("rootpasswd")) {
            users.addUser(username, password);
        }
    }

    public User getUser(String username){
        return users.getUser(username);
    }

    public List<String> getFavorites(String username, String password) {
        if (getUser(username) == null) return new ArrayList<>();
    }

    public void addFavorite(String username, String password, String favorite1) {
            users.addFavorite(username,password,favorite1);
    }

    public void removeFavorite(String username, String password, String favorite1) {
        users.removeFavorite(username,password,favorite1);
    }

    public void addFavorite(String username, String password, String favorite1) {

    }
}

import java.util.ArrayList;
import java.util.List;

public class User {
    private final String username;
    private final String password;
    private final List favorites = new ArrayList<String>();

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getPassword() {
        return password;
    }

    public String getUsername() {
        return username;
    }

    public List<String> getFavorites(){
        return favorites;
    }

    public void addFavorite(String favorite){
        favorites.add(favorite);
    }

    public void removeFavorite(String favorite) {
        favorites.remove(favorite);
    }
}

public interface UserDao {
    public void create(User user);

    public User getUser(String username);
}

import java.util.HashMap;
import java.util.Map;

public class UserDaoWithMap implements UserDao {
    private Map<String, User> users;

    public UserDaoWithMap() {
        this.users = new HashMap<>();
    }

    @Override
    public void create(User user) {
        users.put(user.getUsername(), user);
    }

    @Override
    public User getUser(String username) {
        return users.get(username);
    }
}

    public class Users {
    
    @Autowired
    private UserDao userDao;

    public void addUser(String username, String password) {
        User user = new User(username, password);
        userDao.create(user);
    }

    public User getUser(String username){
        return userDao.getUser(username);
    }

    public boolean login(String username, String password) {
        User user = userDao.getUser(username);
        if (user == null) return false;
        if (!user.getPassword().equals(password)) return false;
        return true;
    }

   public void addFavorite(String username, String password, String favorite1) {
        User user = userDao.getUser(username);
        if(login(username,password)){ 
            user.addFavorite(favorite1);
        }
    }

    public void removeFavorite(String username, String password, String favorite1) {
        User user = userDao.getUser(username);
        if(login(username,password)) {
            user.removeFavorite(favorite1);
        }
    }
}

public class Problem_3{
    public static void main(String[] args){
        double[] myList = {1.2,4.7,3.9,4.0};

        //Print all the array elemts
        for (int i = 0; i < myList.length; i++){
            System.out.println(myList[i]+" ");}

            //Square all elements of the array into a new array
            
            for (int i=0; i<myList.length; i++){
              double[] square = myList[i]* myList[i];}

        

        }
    }