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Thread: How to implement a hostel management application for more than one apartment unit?

  1. #1
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    Default How to implement a hostel management application for more than one apartment unit?

    Hi. I need to design a program to manage the university apartment/hostel. The program must be able to carry out the basic tasks:
    1. Register a new student
    2. Remove a student
    3. Search for a student
    4. Generate a report of the apartment's occupancy

    There are two types of apartments, type A and type B. type A has 2 rooms (but able to house 3 students) and type B has 2 rooms and one master bedroom.


    I have almost completed the program. I still have not implemented feature '3' (search for a student). The problem is that my program only works for one unit of type A and one unit of type B. I would like to know how to design the program so that it works for maybe 10 units of type A and 10 units of type B.

    Also, I would like to know how to I delete a student automatically when the rental expires, which means I do not have to use feature '2' and remove a student manually.

    import java.util.*;
    import java.io.*;
    import javax.swing.JOptionPane;
    import java.text.DecimalFormat;
     
    public class ApartmentManagement
    {
     
      public static void main(String[] args) throws IOException
      {
     
    	DecimalFormat twoDecimals = new DecimalFormat("0.00");
     
    	String input;
    	int task;
    	String apartment;
    	int choice;
    	String confirmation;
    	char confirm;
     
    	String name;
    	String IDinput;
    	int ID;
    	String[] todayDate = new String[6];
    	String[] expiryDate = new String[6];
     
    	String[] nameA = new String[6];
    	int[] ID_A = new int[6];
     
    	String[] nameB = new String[6];
    	int[] ID_B = new int[6];
     
    	String[] nameB_master = new String[1];
    	int[] ID_B_master = new int[6];
     
    	int A = 0;
    	int B = 0;
    	int IDno = 0;
    	int tDate = 0;
    	int eDate = 0;
     
    	Student studentInfo = new Student();
    	Apartment apt = new Apartment();
     
    	GregorianCalendar gcalendar = new GregorianCalendar();
     
    	String[] months = {"January", "February", "March", "April", "May", "June", "July",
    					   "August", "September", "October", "November", "December"};
     
    	String inputDel;
    	int searchDel;
     
    	String inputreturn;
    	char returnToMenu;
     
     
       do
       {
    	input = JOptionPane.showInputDialog("Welcome user.\n" +
    									    "This is a program to manage the university apartments.\n" +
    									    "Please enter the task of your choice: \n\n" +
    										"1. Register a new student and assign an apartment.\n" +
    										"2. Update the apartment status.\n" +
    										"3. Generate a report of the apartment status.\n" +
    										"4. Search for a student's apartment unit.\n" +
    										"5. Exit the program.");
     
    	task = Integer.parseInt(input);
     
     
    	switch (task)
    	 {
    //====================================================== Task 1 ===========================================================================	  
    	  case 1:
    		JOptionPane.showMessageDialog(null, "You selected task 1:\n" +
    									  "Register a new student and assign an apartment.\n" +
    									  "Click OK to continue.");
     
    		apartment = JOptionPane.showInputDialog("There are two different types of apartment for rent.\n" +
    												"Type A:  2 bedrooms with kitchen and laundry facilities.\n" +
    												"Monthly rental:  RM300 per room\n\n" +
    												"Type B:  3 bedrooms including one master bedroom with attached bathroom " +
    												"but without kitchen and laundry facilities.\n" +
    												"Monthly rental:  RM200 per room, master bedroom costs additional 40%.\n\n" +
    												"For Type A, enter 1.\n" +
    												"For Type B, enter 2.\n" +
    												"For Type B  master bedroom, enter 3.\n" +
    												"Please enter your choice.");
     
    		choice = Integer.parseInt(apartment);
     
    		if(choice == 1)
    		{
    			confirmation = JOptionPane.showInputDialog("You have selected apartment Type A.\n" +
    													   "Enter 'Y' to confirm.");
     
    			confirm = confirmation.charAt(0);
    			if (confirm == 'Y' || confirm == 'y')
    			  if (apt.getTypeA() >= 3)
    				JOptionPane.showMessageDialog(null, "Type A apartment is already full. Please select another apartment");
     
    			  else if (apt.getTypeA() < 3)
    			  {
    				name = JOptionPane.showInputDialog("Please enter the student's name.");
    				IDinput = JOptionPane.showInputDialog("Please enter the student's ID.");
    				ID = Integer.parseInt(IDinput);
     
    				studentInfo.storeName(name);
    				studentInfo.storeID(ID);
     
    				nameA[A] = studentInfo.getName();
    				ID_A[IDno] = studentInfo.getID();
     
    				apt.TypeAoccupied();
     
    				JOptionPane.showMessageDialog(null, "The amount to be paid upon registration: \n" +
    											  "RM" + twoDecimals.format(apt.getMonthlycostA()) + " for rental this month\n" +
    											  "RM100.00 for utility charges and rental deposit for a month\n\n" +
    											  "Total: RM" +twoDecimals.format(apt.getcostA()) + "\n\n" +
    											  "Please pay RM" + twoDecimals.format(apt.getMonthlycostA()) +
    											  " for the following months till the rental expires.");
     
    				todayDate[tDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
    				gcalendar.add(Calendar.DATE, + 140);
    				expiryDate[eDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
     
    				JOptionPane.showMessageDialog(null, "Registration details: \n\n" +
    											  "Name: " + nameA[A] + "\n" +
    											  "Student ID: " + ID_A[IDno] + "\n" +
    											  "Date of registration: " + todayDate[tDate] + "\n" +
    											  "Rental expiry date: " + expiryDate[eDate]);
     
    				A++;
    				IDno++;
    				tDate++;
    				eDate++;
    			  }
    		}
     
     
    		if(choice == 2)
    		{
    			confirmation = JOptionPane.showInputDialog("You have selected apartment Type B.\n" +
    													   "Enter 'Y' to confirm.");
     
    			confirm = confirmation.charAt(0);
    			if (confirm == 'Y' || confirm == 'y')
    			  if (apt.getTypeB() >= 2)
    				JOptionPane.showMessageDialog(null, "Type B apartment is already full. Please select another apartment");
     
    			  else if (apt.getTypeB() < 2)
    			  {
    				name = JOptionPane.showInputDialog("Please enter the student's name.");
    				IDinput = JOptionPane.showInputDialog("Please enter the student's ID.");
    				ID = Integer.parseInt(IDinput);
     
    				studentInfo.storeName(name);
    				studentInfo.storeID(ID);
     
    				nameB[B] = studentInfo.getName();
    				ID_B[IDno] = studentInfo.getID();
     
    				apt.TypeBoccupied();
     
    				JOptionPane.showMessageDialog(null, "The amount to be paid upon registration: \n" +
    											  "RM" + twoDecimals.format(apt.getMonthlycostB()) + " for rental this month\n" +
    											  "RM100.00 for utility charges and rental deposit for a month\n\n" +
    											  "Total: RM" +twoDecimals.format(apt.getcostB()) + "\n\n" +
    											  "Please pay RM" + twoDecimals.format(apt.getMonthlycostB()) +
    											  " for the following months till the rental expires.");
     
    				todayDate[tDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
    				gcalendar.add(Calendar.DATE, + 140);
    				expiryDate[eDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
     
    				JOptionPane.showMessageDialog(null, "Registration details: \n\n" +
    											  "Name: " + nameB[B] + "\n" +
    											  "Student ID: " + ID_B[IDno] + "\n" +
    											  "Date of registration: " + todayDate[tDate] + "\n" +
    											  "Rental expiry date: " + expiryDate[eDate]);
     
    				B++;
    				IDno++;
    				tDate++;
    				eDate++;
    			  }
    		}
     
    		if(choice == 3)
    		{
    			confirmation = JOptionPane.showInputDialog("You have selected apartment Type B master bedroom.\n" +
    													   "Enter 'Y' to confirm.");
     
    			confirm = confirmation.charAt(0);
    			if (confirm == 'Y' || confirm == 'y')
    			  if (apt.getTypeB_master() >= 1)
    				JOptionPane.showMessageDialog(null, "Type B master bedroom is already full. Please select another apartment");
     
    			  else if (apt.getTypeB_master() < 1)
    			  {
    				name = JOptionPane.showInputDialog("Please enter the student's name.");
    				IDinput = JOptionPane.showInputDialog("Please enter the student's ID.");
    				ID = Integer.parseInt(IDinput);
     
    				studentInfo.storeName(name);
    				studentInfo.storeID(ID);
     
    				nameB_master[0] = studentInfo.getName();
    				ID_B_master[IDno] = studentInfo.getID();
     
    				apt.TypeB_masteroccupied();
     
    				JOptionPane.showMessageDialog(null, "The amount to be paid upon registration: \n" +
    											  "RM" + twoDecimals.format(apt.getMonthlycostB_master()) + " for rental this month\n" +
    											  "RM100.00 for utility charges and rental deposit for a month\n\n" +
    											  "Total: RM" +twoDecimals.format(apt.getcostB_master()) + "\n\n" +
    											  "Please pay RM" + twoDecimals.format(apt.getMonthlycostB_master()) +
    											  " for the following months till the rental expires.");
     
    				todayDate[tDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
    				gcalendar.add(Calendar.DATE, + 140);
    				expiryDate[eDate] = ((gcalendar.get(Calendar.DATE))+"-"+(months[gcalendar.get(Calendar.MONTH)])+"-"+(gcalendar.get(Calendar.YEAR)) );
     
     
    				JOptionPane.showMessageDialog(null, "Registration details: \n\n" +
    											  "Name: " + nameB_master[0] + "\n" +
    											  "Student ID: " + ID_B_master[IDno] + "\n" +
    											  "Date of registration: " + todayDate[tDate] + "\n" +
    											  "Rental expiry date: " + expiryDate[eDate]);
     
    				IDno++;
    				tDate++;
    				eDate++;
    			  }
    		}
    		break;
     
    //====================================================== Task 2 ===========================================================================	  				
    	  case 2:
    		JOptionPane.showMessageDialog(null, "You selected task 2:\n" +
    									  "Update the apartment status.\n" +
    									  "This task is to remove a student from an apartment.\n" +
    									  "Click OK to continue.");
     
    		if (apt.getTypeA() == 0 && apt.getTypeB() == 0 && apt.getTypeB_master() == 0)
    		{
    			JOptionPane.showMessageDialog(null, "There are currently no student registered in " +
    										  "any of the apartment units.");
    		}
    		else
    		{
    			inputDel = JOptionPane.showInputDialog("Please enter the ID of the student " +
    													"you wish to delete.");
     
    			searchDel = Integer.parseInt(inputDel);
     
    			for(int i = 0; i <= apt.getTypeA(); i++)
    			{
    				if(searchDel == ID_A[i])
    				{
    				  confirmation = JOptionPane.showInputDialog("The following student will be removed:\n" +
    															 "Name: " + nameA[i] + "\n" +
    															 "ID: " + ID_A[i] + "\n\n" +
    															 "Enter 'Y' to confirm.");
    				  confirm = confirmation.charAt(0);
     
    				  if(confirm == 'Y' || confirm == 'y')
    				  {
    					nameA[i] = null;
    					ID_A[i] = 0;
    					apt.TypeAvacant();
     
    					JOptionPane.showMessageDialog(null, "The particular student has been removed.\n" +
    												  "Apartment Type A now has " + (3 - apt.getTypeA()) + " rooms available.");
     
    				  }
     
    				}
    			}
     
    			for(int i = 0; i <= apt.getTypeB(); i++)
    			{
    				if(searchDel == ID_B[i])
    				{
    				  confirmation = JOptionPane.showInputDialog("The following student will be removed:\n" +
    															 "Name: " + nameB[i] + "\n" +
    															 "ID: " + ID_B[i] + "\n\n" +
    															 "Enter 'Y' to confirm.");
    				  confirm = confirmation.charAt(0);
     
    				  if(confirm == 'Y' || confirm == 'y')
    				  {
    					nameB[i] = null;
    					ID_B[i] = 0;
    					apt.TypeBvacant();
     
    					JOptionPane.showMessageDialog(null, "The particular student has been removed.\n" +
    												  "Apartment Type A now has " + (2 - apt.getTypeB()) + " rooms available.");
    				  }
    				}
    			}
     
    			for(int i = 0; i <= apt.getTypeB_master(); i++)
    			{
    				if(searchDel == ID_B_master[i])
    				{
    				  confirmation = JOptionPane.showInputDialog("The following student will be removed:\n" +
    															 "Name: " + nameB_master[i] + "\n" +
    															 "ID: " + ID_B_master[i] + "\n\n" +
    															 "Enter 'Y' to confirm.");
    				  confirm = confirmation.charAt(0);
     
    				  if(confirm == 'Y' || confirm == 'y')
    				  {
    					nameB_master[i] = null;
    					ID_B_master[i] = 0;
    					apt.TypeB_mastervacant();
     
    					JOptionPane.showMessageDialog(null, "The particular student has been removed.\n" +
    												  "Apartment Type A now has " + (1 - apt.getTypeB_master()) + " rooms available.");
    				  }
    				}
    			}
    		}
    		break;
     
    //====================================================== Task 3 ===========================================================================
    	  case 3:
    		JOptionPane.showMessageDialog(null, "You selected task 3:\n" +
    									  "Generate a report of the apartment status.\n" +
    									  "Click OK to continue.");
     
     
    		if (apt.getTypeA() == 0 && apt.getTypeB() == 0 && apt.getTypeB_master() == 0)
    		{
    			JOptionPane.showMessageDialog(null, "There are currently no student registered in " +
    										  "any of the apartment units.");
    		}
     
    		else
    		{
    			for(int i = 0; i <= apt.getTypeA(); i++)
    			{
    				JOptionPane.showMessageDialog(null, "These are the list of students staying " +
    											  "in apartment Type A: \n" +
    											  "Name: " + nameA[i] + "\n" +
    											  "ID: " + ID_A[i] + "\n" +
    											  "Date of registration: " + todayDate[i] + "\n" +
    											  "Date of rental expiry: " + expiryDate[i] + "\n\n");
    			}
     
    			for(int i = 0; i <= apt.getTypeB(); i++)
    			{
    				JOptionPane.showMessageDialog(null, "These are the list of students staying " +
    											  "in apartment Type B: \n" +
    											  "Name: " + nameB[i] + "\n" +
    											  "ID: " + ID_B[i] + "\n" +
    											  "Date of registration: " + todayDate[i] + "\n" +
    											  "Date of rental expiry: " + expiryDate[i] + "\n\n");
    			}
     
    			for(int i = 0; i <= apt.getTypeB_master(); i++)
    			{
    				JOptionPane.showMessageDialog(null, "These are the list of students staying " +
    											  "in apartment Type B master bedroom: \n" +
    											  "Name: " + nameB_master[i] + "\n" +
    											  "ID: " + ID_B_master[i] + "\n" +
    											  "Date of registration: " + todayDate[i] + "\n" +
    											  "Date of rental expiry: " + expiryDate[i] + "\n\n");
    			}
     
    			JOptionPane.showMessageDialog(null, "The total number of occupants in the following apartments are: \n" +
    									  "Type A: " + apt.getTypeA() + "\n" +
    									  "Type B: " + apt.getTypeB() + "\n" +
    									  "Type B master bedroom: " + apt.getTypeB_master() + "\n\n");
     
    			JOptionPane.showMessageDialog(null, "The total number of vacant rooms in the following apartments are: \n" +
    									  "Type A: " + (3 - apt.getTypeA()) + "\n" +
    									  "Type B: " + (2 - apt.getTypeB()) + "\n" +
    									  "Type B master bedroom: " + (1 - apt.getTypeB_master()) + "\n\n");
     
    		}
    		break;
     
    	 }
     
    	 inputreturn = JOptionPane.showInputDialog("Do you want to return to the main menu?\n" +
    											   "Enter 'Y' for yes.");
     
    	 returnToMenu = inputreturn.charAt(0);
     
       } while(returnToMenu == 'Y' || returnToMenu == 'y');
     
       System.exit(0);
      }
    }

    I'm using Student class and Apartment class. Here are the source code for Student.class and Apartment.class

    public class Student
    {
    	private String Name;
    	private int Student_ID;
    	private String delete = null;
    	private int ID_delete = 0;
     
     
    	/*public Student(String studentName, int studentID)
    	{
    		Name = studentName;
    		Student_ID = studentID;
    	}*/
     
    	public void storeName(String studentName)
    	{
    		Name = studentName;
    	}
     
    	public void storeID(int studentID)
    	{
    		Student_ID = studentID;
    	}
     
    	public String getName()
    	{
    		return Name;
    	}
     
    	public int getID()
    	{
    		return Student_ID;
    	}
    }


    class Apartment
    {
    	private int TypeA;
    	private int TypeB;
    	private int TypeB_master;
     
    	private final double MonthlycostA;
    	private final double MonthlycostB;
    	private final double MonthlycostB_master;
     
    	private final double costA;
    	private final double costB;
    	private final double costB_master;
     
    	public Apartment()
    	{
    		TypeA = 0;
    		TypeB = 0;
    		TypeB_master = 0;
     
    		MonthlycostA = 300.00;
    		MonthlycostB = 200.00;
    		MonthlycostB_master = (1.4f)*(MonthlycostB);
     
    		costA = 400.00;
    		costB = 300.00;
    		costB_master = 380.00;
    	}
     
    	public void TypeAoccupied()
    	{
    		TypeA++;
    	}
    	public void TypeAvacant()
    	{
    		TypeA--;
    	}
    	public void TypeBoccupied()
    	{
    		TypeB++;
    	}
    	public void TypeBvacant()
    	{
    		TypeB--;
    	}
    	public void TypeB_masteroccupied()
    	{
    		TypeB_master++;
    	}
    	public void TypeB_mastervacant()
    	{
    		TypeB_master--;
    	}
     
    	public double getcostA()
    	{
    		return costA;
    	}
    	public double getcostB()
    	{
    		return costB;
    	}
    	public double getcostB_master()
    	{
    		return costB_master;
    	}
     
    	public double getMonthlycostA()
    	{
    		return MonthlycostA;
    	}
    	public double getMonthlycostB()
    	{
    		return MonthlycostB;
    	}
    	public double getMonthlycostB_master()
    	{
    		return MonthlycostB_master;
    	}
     
    	public int getTypeA()
    	{
    		return TypeA;
    	}
    	public int getTypeB()
    	{
    		return TypeB;
    	}
    	public int getTypeB_master()
    	{
    		return TypeB_master;
    	}
    }

    I hope my problem would be solved. Thanks


  2. #2
    Super Moderator jps's Avatar
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    Default Re: How to implement a hostel management application for more than one apartment unit

    How do you do it for just one? ...do that ten times

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