Programming - Java All-In-One Exercise Extended (Solution)

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    I managed to fix some things so here the Solution to this Exercise. Here you can find the previous Exercise and here it's Solution. So, without further do, here comes the Solution.

Solution:

    I already explained in the Exercise Post what I did to create all this. 

    Just to make things clear:

  • There could be Bugs or Things everywhere, cause it is very difficult to test so many different things!
  • You don't have to do everything exactly as I did it!
  • This is just an example Solution and many things were edited very fast!
  • This Exercise is not the exact same I had to do in my University, so I had to rewrite many things and it took a lot of time, so if anything doesn't work it is because I did some things fast, so that I can start out with different things for the upcoming days!

So, after this big shout out. Here the Coding :)

Address, Person, Owner and Administrator are the exact same as last time!

 Address:

import java.io.Serializable;
public class Address implements Serializable { // Address.java
    private String city;
    private String street;
    private int number;
    private int zip;
    // CONSTRUCTORS
    public Address() {
        city = null;
 street = null;
 number = -1;
 zip = -1;
    }
    public Address(String city, String street, int number, int zip) {
        this.city = city;
        this.street = street;
        this.number = number;
        this.zip = zip;
    }
    // GETTERS-SETTERS
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public String getStreet() {
        return street;
    }
    public void setStreet(String street) {
        this.street = street;
    }
    public int getNumber() {
        return number;
    }
    public void setStreetNumber(int number) {
        this.number = number;
    }
    public int getZip() {
        return zip;
    }
    public void setZip(int zip) {
        this.zip = zip;
    }
    // METHODS
    public String toString() {
        return city + "\n" + street + "\n" + number + " " + zip;
    }
}

Person:

import java.io.Serializable;
public class Person implements Serializable { // Person.java
    private int id;
    private String name;
    private String surname;
    private Address a;
    // CONSTRUCTORS
    public Person() {
        id = -1;
        name = null;
        surname = null;
        a = null;
    }

    public Person(int id, String name, String surname, Address a) {

        this.id = id;
        this.name = name;
        this.surname = surname;
 this.a = a;
    }
    // GETTERS-SETTERS
    public int getId() {
        return id;
    }
    public void setId(int id) {
 this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSurname() {
 return surname;
    }
    public void setSurname(String surname) {
 this.surname = surname;
    }
    public Address getA() {
        return a;
    }
    public void setA(Address a) {
 this.a = a;
    }    
    // METHODS
    public String toString() {
 return id + "\n" + name + "\n" + surname + "\n" + a.toString();
    }
}

Owner:

import java.io.Serializable;
public class Owner extends Person implements Serializable { // Owner.java
    private Apartment apartment;
    // CONSTRUCTORS
    public Owner() {
    super();
    }
    public Owner(int id, String name, String surname, Address a) {
 super(id, name, surname, a);
    }
    // GETTERS-SETTERS
    public Apartment getApartment() {
 return apartment;
    }
    public void setApartment(Apartment apartment) {
 this.apartment = apartment;
    }
    // METHODS
    public String toString() {
 return super.toString();
    }    
}

Administrator:

import java.io.Serializable;
public class Administrator extends Person implements Serializable { // Administrator.java
    private Condominium condo;
    // CONSTRUCTORS
    public Administrator() {
 super();
    }
    public Administrator(int id, String name, String surname, Address a) {
     super(id, name, surname, a);
    }
    // GETTERS-SETTERS
    public Condominium getCondo() {
 return condo;
    }
    public void setCondo(Condominium condo) {
 this.condo = condo;
    }
    // METHODS
    public String toString() {
 return super.toString();
    }
}

Apartment:

import java.io.Serializable;
import java.util.ArrayList;
import java.util.StringTokenizer;
public class Apartment implements Serializable { // Apartment.java
    private int condominiumID;
    private String apartmentID;
    ArrayList<Owner> owners = new ArrayList<>();
    private int squareMeters;
    private int millRate;
    private double propertyCharges;
    // CONSTRUCTORS
    public Apartment() {
        condominiumID = -1;
        apartmentID = null;
 squareMeters = -1;
 millRate = 0;
 propertyCharges = 0.0;
    }
    // 2 overloaded Constructors to make it easier for File Reading
    public Apartment(int condominiumID, String apartmentID, int squareMeters) {
 this.condominiumID = condominiumID;
 this.apartmentID = apartmentID;
 this.squareMeters = squareMeters;
 millRate = calculateMillRate();
 propertyCharges = 0;
    }
    public Apartment(int condominiumID, String apartmentID, int squareMeters, int millRate, double propertyCharges) {
 this.condominiumID = condominiumID;
 this.apartmentID = apartmentID;
 this.squareMeters = squareMeters;
 this.millRate = millRate;
 this.propertyCharges = propertyCharges;
    }
    // GETTERS-SETTERS
    public int getCondominiumID() {
 return condominiumID;
    }
    public void setCondominiumID(int condominiumID) {
 this.condominiumID = condominiumID;
    }
    public String getApartmentID() {
 return apartmentID;
    }
    public void setApartmentID(String apartmentID) {
 this.apartmentID = apartmentID;
    }
    public int getSquareMeters() {
 return squareMeters;
    }
    public void setSquareMeters(int squareMeters) {
 this.squareMeters = squareMeters;
    }
    public int getMillRate() {
 return millRate;
    }
    public void setMillRate(int millRate) {
 this.millRate = millRate;
    }
    public double getPropertyCharges() {
 return propertyCharges;
    }
    public void setPropertyCharges(double propertyCharges) {
 this.propertyCharges = propertyCharges;
    }
    // METHODS
    public int calculateMillRate() {
 int apartmentMilm;
 // find condo in which the apartment belongs
 Condominium c = null;
 for (int i = 0; i < Driver.driver.condos.size(); i++) {
     if (Driver.driver.condos.get(i).getId() == condominiumID) {
         c = Driver.driver.condos.get(i);
     }
 }
 int N = c.apartments.size();
 if (N == 0) {
     return 1000;
 }
 double[] weight = new double[N + 1];
 // loop all apartments to calculate weight
 for (int i = 0; i < N; i++) {
     weight[i] = c.apartments.get(i).getSquareMeters();
     // we use an object that does the same as strtok() in C
     // and splits the String where a specific character appears
                StringTokenizer strTok = new StringTokenizer(c.apartments.get(i).getApartmentID(), "_");
     // we get the first "number" that represents the floor
     // and convert it to an Integer
     int floor = Integer.parseInt(strTok.nextToken());
     weight[i] = weight[i] * (1 + ((floor - 1) * 0.2));
 }
 // the new apartment
 StringTokenizer strTok = new StringTokenizer(apartmentID, "_");
 int floor = Integer.parseInt(strTok.nextToken());
 weight[N] = squareMeters * (1 + ((floor - 1) * 0.2));
 // calculate sum of weights
 double sumWeight = 0;
 for (int i = 0; i < N + 1; i++) {
     sumWeight += weight[i];
 }
 // recalculate millRate of all apartments
 for (int i = 0; i < N; i++) {
     c.apartments.get(i).setMillRate((int) ((weight[i] / sumWeight)));
 }
 // calculate apartment's millRate
 apartmentMilm = (int) ((weight[N] / sumWeight));
 return apartmentMilm;
    }
    public String toString() {
 return condominiumID + "\n" + apartmentID + "\n" + squareMeters + " " + millRate + " " + propertyCharges;
    }
}

Condominium:

import java.io.Serializable;
import java.util.ArrayList;
import javax.swing.JOptionPane;
public class Condominium implements Serializable { // Condominium.java
    private int id;
    private Address a;
    ArrayList<Administrator> admins = new ArrayList<>();
    ArrayList<Owner> owners = new ArrayList<>();
    ArrayList<Apartment> apartments = new ArrayList<>();
    private double expenditure;
    // CONSTRUCTORS
    public Condominium() {
 id = -1;
 a = null;
 expenditure = 0.0;
    }
    public Condominium(int id, Address a) {
 this.id = id;
 this.a = a;
 expenditure = 0.0;
    }
    // GETTERS-SETTERS
    public int getId() {
 return id;
    }
    public void setId(int id) {
 this.id = id;
    }
    public Address getA() {
 return a;
    }
    public void setA(Address a) {
 this.a = a;
    }
    // expenditure will be inputed with another method
    // METHODS
    public boolean findApartment(String apartmentcode) {
 for (int i = 0; i < apartments.size(); i++) {
     // checking equality of strings
     if (apartmentcode.equals(apartments.get(i).getApartmentID())) {
         JOptionPane.showMessageDialog(null, "Apartment:\n" + apartments.get(i));
         return true;
     }
 }
 return false;
    }
    public void printApartments() {
 String temp = "Condo " + id + " has:\n";
 for (int i = 0; i < apartments.size(); i++) {
     temp += apartments.get(i) + "\n";
 }
 JOptionPane.showMessageDialog(null, temp);
    }
    public void setCondominiumPropertyCharges(int condominiumCode, double expenditure) {
 if (condominiumCode == this.id) {
     this.expenditure = expenditure;
 } else {
     JOptionPane.showMessageDialog(null, "No Condominium has the id " + condominiumCode);
 }
    }
    public void apartmentPropertyCharges() {
 for (int i = 0; i < apartments.size(); i++) {
     apartments.get(i).setPropertyCharges(expenditure * apartments.get(i).getMillRate() / 1000);
 }
    }
    public String toString() {
 return id + "\n" + a.toString() + "\n" + expenditure;
    }
}

Now the Last 3 Are for the GUI

Driver:

import java.awt.GridLayout;
import java.io.*;
import java.util.ArrayList;
import javax.swing.*;
public class Driver extends JFrame { // Driver.java
    ArrayList<Condominium> condos = new ArrayList<>();
    static Driver driver;
    public static void main(String[] args) {
 driver = new Driver("Condominium Programm");
    }
    // CONSTRUCTOR
    public Driver(String title) {
 // set up frame
 this.setTitle(title);
 this.setSize(500, 700);
 this.setResizable(false);
 this.setLocationByPlatform(true);
 this.setDefaultCloseOperation(EXIT_ON_CLOSE);
 this.setLayout(new GridLayout(14, 1));
 // set up Custom "Choice" Buttons
 Choice[] choices = new Choice[14];
 for (int i = 0; i < choices.length; i++) {
     choices[i] = new Choice();
     choices[i].setName(Integer.toString(i));
 }
 choices[0].setText("1. Insert Administator/Condominium");
 choices[1].setText("2. Insert Owner/Apartment");
 choices[2].setText("3. Add an Admin to a Condominium");
 choices[3].setText("4. Add an Owner to an Apartment");
 choices[4].setText("5. Print All Apartments");
 choices[5].setText("6. Find Apartment using Code");
 choices[6].setText("7. Find Property charges of specific Owner");
 choices[7].setText("8. Calculate Expenditure of all Condos");
 choices[8].setText("9. Calculate/Print Property charges of all Apartments");
 choices[9].setText("10. Save to Text File");
 choices[10].setText("11. Load from Text File");
 choices[11].setText("12. Save to Serializable File");
 choices[12].setText("13. Load from Serializable File");
 choices[13].setText("0. Exit");
 for (int i = 0; i < choices.length; i++) {
     this.add(choices[i]);
 }
 this.setVisible(true);
    }
}

Choice:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JOptionPane;
public class Choice extends JButton implements ActionListener {
    // CONSTRUCTOR
    Choice() {
 addActionListener(this);
    }
    @Override
    public void actionPerformed(ActionEvent e) {
 // get name of Button and run specified action
 switch (this.getName()) {
 // on all those Cases we create an "Input" JDialog Window
 case "0": // Insert Administator/Condominium
 case "1": // Insert Owner/Apartment
 case "2": // Add an Admin to a Condominium
 case "3": // Add an Owner to an Apartment"
     new Input(this.getName());
     break;
 case "4": // Print All Apartments
     printApartments();
     break;
 case "5": // Find Apartment using Code
     String apartmentcode = JOptionPane.showInputDialog("Give Apartment Code");
     findApartmentCharges(apartmentcode);
     break;
 case "6": // Find Property charges of specific Owner
     int id = Integer.parseInt(JOptionPane.showInputDialog("Give an Owner ID"));
     findPropertyCharges(id);
     break;
 // in this 2 Cases we create an "Input" JDialog Window
 case "7": // Calculate Expenditure of all Condos
 case "8": // Calculate/Print Property charges of all Apartments
     new Input(this.getName());
     break;
 case "9": // Save to Text File
     writeToTextFile();
     break;
 case "10": // Load from Text File
     readFromTextFile();
     break;
 case "11": // Save to Serializable File
     writeToSerializableFile();
     break;
 case "12": // Load from Serializable File
     readFromSerializableFile();
     break;
 case "13": // Exit
     System.exit(0);
     break;
 }
    }
    // METHODS
    public void printApartments() {
 if (Driver.driver.condos.size() == 0) {
     JOptionPane.showMessageDialog(null, "No Condos/Apartments Inserted");
     return;
 }
 for (int i = 0; i < Driver.driver.condos.size(); i++) {
     Driver.driver.condos.get(i).printApartments();
 }
    }
    public void findApartmentCharges(String id) {
 boolean found = false;
 for (int i = 0; i < Driver.driver.condos.size(); i++) {
     found = Driver.driver.condos.get(i).findApartment(id);
     if (found == true) {
         return;
     }
 }
 if (found == false) {
     JOptionPane.showMessageDialog(null, "No Apartment has the id " + id);
 }
    }
    public void findPropertyCharges(int id) {
 for (int i = 0; i < Driver.driver.condos.size(); i++) {
     for (int j = 0; j < Driver.driver.condos.get(i).owners.size(); j++) {
         // check equality of ids
         if (Driver.driver.condos.get(i).owners.get(j).getId() == id) {
             JOptionPane.showMessageDialog(null, "Owner with id " + id + " has to pay "
 + Driver.driver.condos.get(i).owners.get(j).getApartment().getPropertyCharges());
             return;
         }
     }
 }
 JOptionPane.showMessageDialog(null, "No Owner has the id " + id);
    }
    public void writeToTextFile() {
 try {
     PrintWriter writer = new PrintWriter(new FileOutputStream("condominium.txt"));
     // write num of Condos
     writer.println(Driver.driver.condos.size());
     // write each Condo separatly
     for (int i = 0; i < Driver.driver.condos.size(); i++) {
         Condominium c = Driver.driver.condos.get(i);
         writer.println(c.toString());
         // admin data
         writer.println(c.admins.size());
         for (int j = 0; j < c.admins.size(); j++) {
             writer.println(c.admins.get(j));
         }
         // apartment data
         writer.println(c.apartments.size());
         for (int j = 0; j < c.apartments.size(); j++) {
             Apartment a = c.apartments.get(j);
             writer.println(a.toString());
             // owner of apartments
             writer.println(a.owners.size());
             for (int k = 0; k < a.owners.size(); k++) {
                 writer.println(a.owners.get(k));
             }
         }
         // we don't write the owner list
         // we will do it in another way
         // while reading
     }
     writer.close();
 } catch (IOException ioe) {
     JOptionPane.showMessageDialog(null, ioe.getMessage());
 }
    }
    public void readFromTextFile() {
 try {
     Scanner reader = new Scanner(new FileInputStream("condominium.txt"));
     // read size
     int num = Integer.parseInt(reader.nextLine());
     // read each Condo seperately
     for (int i = 0; i < num; i++) {
         // read condo data
         int tempCondoID = Integer.parseInt(reader.nextLine());
         // address
         String tempCity = reader.nextLine();
         String tempStreet = reader.nextLine();
         int tempStreetNumber = reader.nextInt();
         int tempPostalCode = reader.nextInt();
         reader.nextLine();
         Address tempA = new Address(tempCity, tempStreet, tempStreetNumber, tempPostalCode);
         Condominium condo = new Condominium(tempCondoID, tempA);
         // expenditure
         condo.setCondominiumPropertyCharges(tempCondoID, Double.parseDouble(reader.nextLine()));
         // admin data
         int num2 = Integer.parseInt(reader.nextLine());
         for (int j = 0; j < num2; j++) {
             int tempAdminID = Integer.parseInt(reader.nextLine());
             String tempName = reader.nextLine();
             String tempSurname = reader.nextLine();
             // address
             tempCity = reader.nextLine();
             tempStreet = reader.nextLine();
             tempStreetNumber = reader.nextInt();
             tempPostalCode = reader.nextInt();
             reader.nextLine();
             Address tempA2 = new Address(tempCity, tempStreet, tempStreetNumber, tempPostalCode);
             // add admin to condo
             Administrator admin = new Administrator(tempAdminID, tempName, tempSurname, tempA2);
             condo.admins.add(admin);
         }
         // apartment data
         int num3 = Integer.parseInt(reader.nextLine());
         for (int j = 0; j < num3; j++) {
             tempCondoID = Integer.parseInt(reader.nextLine());
             String tempApartmentID = reader.nextLine();
             int tempSquareMeters = reader.nextInt();
             int tempMillRate = reader.nextInt();
             double tempPropertyCharges = Double.parseDouble(reader.nextLine());
             Apartment a = new Apartment(tempCondoID, tempApartmentID, 
tempSquareMeters, tempMillRate, tempPropertyCharges);
             // read owner data
             int num4 = Integer.parseInt(reader.nextLine());
             for (int k = 0; k < num4; k++) {
                 int tempOwnerID = Integer.parseInt(reader.nextLine());
                 String tempName = reader.nextLine();
                 String tempSurname = reader.nextLine();
                 // address
                 tempCity = reader.nextLine();
                 tempStreet = reader.nextLine();
                 tempStreetNumber = reader.nextInt();
                 tempPostalCode = reader.nextInt();
                 reader.nextLine();
                 Address tempA3 = new Address(tempCity, tempStreet, tempStreetNumber, tempPostalCode);
                 // add owner to apartment and condo
                 Owner tempOwner = new Owner(tempOwnerID, tempName, tempSurname, tempA3);
                 a.owners.add(tempOwner);
                 condo.owners.add(tempOwner);
             }
             // add apartment to condo
             condo.apartments.add(a);
         }
         // add condo to condo list
         Driver.driver.condos.add(condo);
     }
     reader.close();
 } catch (IOException ioe) {
     JOptionPane.showMessageDialog(null, ioe.getMessage());
 }
    }
    public void writeToSerializableFile() {
 try {
     ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("condominium.dat"));
     // write condos
     oos.writeInt(Driver.driver.condos.size());
     for (int i = 0; i < Driver.driver.condos.size(); i++) {
         oos.writeObject(Driver.driver.condos.get(i));
     }
     oos.close();
 } catch (IOException ioe) {
     JOptionPane.showMessageDialog(null, ioe.getMessage());
 }
    }
    public void readFromSerializableFile() {
 try {
     ObjectInputStream ois = new ObjectInputStream(new FileInputStream("condominium.dat"));
     // read condos
     int num = ois.readInt();
     for (int i = 0; i < num; i++) {
         Driver.driver.condos.add((Condominium) ois.readObject());
     }
     ois.close();
 } catch (IOException | ClassNotFoundException ioe) {
     JOptionPane.showMessageDialog(null, ioe.getMessage());
 }
    }
}

Input:

import java.awt.GridLayout;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Input extends JDialog {
    // CONSTRUCTOR
    public Input(String name) {
 // get name of button that called it
 // to create the right type of Input
 switch (name) {
 case "0": // Insert Administator/Condominium
     this.setTitle("Insert Administrator/Condiminium");
     this.setSize(600, 400);
     this.setLayout(new GridLayout(8, 2));
     // add Labels
     this.add(new JLabel("Admin"));
     this.add(new JLabel("Condo"));
     // add TextFields
     JTextField[] texts = new JTextField[12];
     for (int i = 0; i < texts.length; i++) {
         texts[i] = new JTextField();
         texts[i].setText("");
     }
     for (int i = 0; i < 10; i++) {
         this.add(texts[i]);
     }
     this.add(texts[10]);
     this.add(new JLabel(""));
     this.add(texts[11]);
     // add Button
     JButton button = new JButton("OK");
     button.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             for (int i = 0; i < texts.length; i++) {
                 if (texts[i].getText().equals("")) {
                     JOptionPane.showMessageDialog(null, "Please Fill All TextFields!");
                     return;
                 }
             }
             // get Text from TextFields and convert it if needed
             Address a1 = new Address(texts[6].getText(), texts[8].getText(),
             Integer.parseInt(texts[10].getText()), Integer.parseInt(texts[11].getText()));
             Address a2 = new Address(texts[3].getText(), texts[5].getText(),
             Integer.parseInt(texts[7].getText()), Integer.parseInt(texts[9].getText()));
             Administrator admin = new Administrator(Integer.parseInt(texts[0].getText()), texts[2].getText(),
             texts[4].getText(), a1);
             Condominium condo = new Condominium(Integer.parseInt(texts[1].getText()), a2);
             // set composition partners
             admin.setCondo(condo);
             condo.admins.add(admin);
             // add Condo to Driver
             Driver.driver.condos.add(condo);
             Input.this.setVisible(false);
             Input.this.dispose();
         }
     });
     this.add(button);
     this.setVisible(true);
     break;
 case "1": // Insert Owner/Apartment
     this.setTitle("Insert Owner/Apartment");
     this.setSize(600, 400);
     this.setLayout(new GridLayout(8, 2));
     // add Labels
     this.add(new JLabel("Owner"));
     this.add(new JLabel("Apartment"));
     // add TextFields
     JTextField[] texts2 = new JTextField[10];
     for (int i = 0; i < texts2.length; i++) {
         texts2[i] = new JTextField();
         texts2[i].setText("");
     }
     for (int i = 0; i < 7; i++) {
         this.add(texts2[i]);
     }
     this.add(new JLabel(""));
     this.add(texts2[7]);
     this.add(new JLabel(""));
     this.add(texts2[8]);
     this.add(new JLabel(""));
     this.add(texts2[9]);
     // add Button
     JButton button2 = new JButton("OK");
     button2.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             for (int i = 0; i < texts2.length; i++) {
                 if (texts2[i].getText().equals("")) {
                     JOptionPane.showMessageDialog(null, "Please Fill All TextFields!");
                     return;
                 }
             }
             // get Text from TextFields and convert it if needed
             Address a3 = new Address(texts2[6].getText(), texts2[7].getText(),
             Integer.parseInt(texts2[8].getText()), Integer.parseInt(texts2[9].getText()));
             Owner owner = new Owner(Integer.parseInt(texts2[0].getText()), texts2[2].getText(),
             texts2[4].getText(), a3);
             Apartment a = new Apartment(Integer.parseInt(texts2[1].getText()), texts2[3].getText(),
             Integer.parseInt(texts2[5].getText()));
             // set composition partners
             owner.setApartment(a);
             a.owners.add(owner);
             // add Owner and Apartment to Condo
             for (int i = 0; i < Driver.driver.condos.size(); i++) {
                 if (Driver.driver.condos.get(i).getId() == a.getCondominiumID()) {
                 Driver.driver.condos.get(i).owners.add(owner);
                 Driver.driver.condos.get(i).apartments.add(a);
                     Input.this.setVisible(false);
                     Input.this.dispose();
                     return;
                 }
             }
             JOptionPane.showMessageDialog(null, "No Condominium has this ID!");
         }
     });
     this.add(button2);
     this.setVisible(true);
     break;
 case "2": // Add an Admin to a Condominium
     this.setTitle("Add an Admin to a Condominium");
     this.setSize(600, 500);
     this.setLayout(new GridLayout(8, 1));
     // add Textfields
     JTextField[] texts3 = new JTextField[7];
     for (int i = 0; i < texts3.length; i++) {
         texts3[i] = new JTextField();
         texts3[i].setText("");
         this.add(texts3[i]);
     }
     // add Button
     JButton button3 = new JButton("OK");
     button3.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             Address a4 = new Address(texts3[3].getText(), texts3[4].getText(),
             Integer.parseInt(texts3[5].getText()), Integer.parseInt(texts3[6].getText()));
             Administrator admin2 = new Administrator(Integer.parseInt(texts3[0].getText()), texts3[1].getText(),
             texts3[2].getText(), a4);
             int condo_id = Integer.parseInt(JOptionPane.showInputDialog("Give Condo ID"));
             for (int i = 0; i < Driver.driver.condos.size(); i++) {
                 Condominium c = Driver.driver.condos.get(i);
                 if (c.getId() == condo_id) {
                     c.admins.add(admin2);
                     Input.this.setVisible(false);
                     Input.this.dispose();
                     return;
                 }
             }
             JOptionPane.showMessageDialog(null, "No Condo has this ID");
         }
     });
     this.add(button3);
     this.setVisible(true);
     break;
 case "3": // Add an Owner to an Apartment"
     this.setTitle("Add an Owner to an Apartment");
     this.setSize(600, 500);
     this.setLayout(new GridLayout(8, 1));
     // add Textfields
     JTextField[] texts4 = new JTextField[7];
     for (int i = 0; i < texts4.length; i++) {
         texts4[i] = new JTextField();
         texts4[i].setText("");
         this.add(texts4[i]);
     }
     // add Button
     JButton button4 = new JButton("OK");
     button4.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             Address a5 = new Address(texts4[3].getText(), texts4[4].getText(),
             Integer.parseInt(texts4[5].getText()), Integer.parseInt(texts4[6].getText()));
             Owner owner = new Owner(Integer.parseInt(texts4[0].getText()), texts4[1].getText(),
             texts4[2].getText(), a5);
             String apartment_id = JOptionPane.showInputDialog("Give Apartment ID");
             for (int i = 0; i < Driver.driver.condos.size(); i++) {
                 Condominium c = Driver.driver.condos.get(i);
                 for (int j = 0; j < c.apartments.size(); j++) {
                     if (c.apartments.get(j).getApartmentID().equals(apartment_id)) {
                         c.owners.add(owner);
                     c.apartments.get(j).owners.add(owner);
                         Input.this.setVisible(false);
                         Input.this.dispose();
                         return;
                     }
                 }
             }
             JOptionPane.showMessageDialog(null, "No Apartment has this ID");
         }
     });
     this.add(button4);
     break;
 case "7": // Calculate Expenditure of all Condos
     this.setTitle("Calculate Expenditure of all Condos");
     this.setSize(400, 300);
     this.setLayout(new GridLayout(Driver.driver.condos.size() + 1, 2));
     // add TextFields
     JTextField[] texts5 = new JTextField[Driver.driver.condos.size()];
     for (int i = 0; i < texts5.length; i++) {
         texts5[i] = new JTextField();
         texts5[i].setText("");
         this.add(new JLabel("Condo " + Driver.driver.condos.get(i).getId()));
         this.add(texts5[i]);
     }
     // add Button
     JButton button5 = new JButton("OK");
     button5.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             for (int i = 0; i < texts5.length; i++) {
                 if (texts5[i].getText().equals("")) {
                     JOptionPane.showMessageDialog(null, "Please Fill All TextFields!");
                     return;
                 }
             }
             // get Text from TextFields and convert it if needed
             for (int i = 0; i < texts5.length; i++) {
                 Condominium c = Driver.driver.condos.get(i);
                 c.setCondominiumPropertyCharges(c.getId(), Double.parseDouble(texts5[i].getText()));
             }
             Input.this.setVisible(false);
             Input.this.dispose();
         }
     });
     this.add(button5);
     this.setVisible(true);
     break;
 case "8": // Calculate/Print Property charges of all Apartments
                this.setTitle("Calculate/Print Property charges of all Apartments");
     this.setSize(300, 600);
     int num = 0;
     for (int i = 0; i < Driver.driver.condos.size(); i++) {
         num += Driver.driver.condos.get(i).apartments.size();
         // calculate charges
         Driver.driver.condos.get(i).apartmentPropertyCharges();
     }
     this.setLayout(new GridLayout(num + 1, 2));
     // print charges into Layout
     for (int i = 0; i < Driver.driver.condos.size(); i++) {
         Condominium c = Driver.driver.condos.get(i);
         for (int j = 0; j < c.apartments.size(); j++) {
             this.add(new JLabel(c.apartments.get(i).getApartmentID()));
             this.add(new JLabel(Double.toString(c.apartments.get(i).getPropertyCharges())));
         }
     }
     JButton button6 = new JButton("OK");
     button6.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
             Input.this.setVisible(false);
             Input.this.dispose();
         }
     });
     this.add(button6);
     this.setVisible(true);
     break;
 }
    }
}

    You can see that I don't put more Labels that indicate what Kind of Input needs to be Inserted for Admin, Owner and so on, cause it would get even more complicated. You can try it out using numbers if you want tho :) I also don't check if some Choice is already made so that it is not allowed to run another one too. So, the GUI can look like this 


    This was the End of Today's Post. The GUI Code is too large and that's why we get too many Scrollbars. That's why I will stop with Java (for now), cause Coding in other languages is more compact. I will upload 2 Exercises in C for Queues and Stacks and then we will start taking a look into Assembly :D
Hope you enjoyed this Solution/Post :)

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drifter10
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