Question

We have studied the following topics:

1. How to interact with users via dialog boxes.
2. Super class and sub class.
3. One- and two-dimensional arrays in Java.

In this SLP assignment, we will make changes to our previous programs based on what we have learned. Write a Java application program to calculate property tax. Your program should have the following functions:

1. Prompt users for the number of properties.
2. Prompt users for property tax.
3. Prompt users to input the value for each property
4. Calculate the TOTAL amount of all property tax combined
5. User must press "E" to terminate the program.

Hint: one dimensional array is sufficient for this program, assuming all properties are in the same city, hence, the property tax is the same.

You will also need to write pseudo code for this assignment.

Using your knowledge of arrays, repetition statement, selection statement, and other Java fundamentals, write a property tax calculator program. The following items will be assessed in particular:

1. Arrays used in the program.
2. GUI feature used to allow users interaction.
3. Whether the program has bugs.

Answer 1

/*
The java program that prompts user to enter the number of properties to enter the cost. Then read the properties into an array of double type. The find the tax of each property and add to the total tax. The program continues either user enters E to exit or all properties are entered. Then finally display the property tax collected on message dialog
* */
//Main.java
import java.util.Scanner;
import javax.swing.JOptionPane;
public class Main
{
   public static void main(String[] args)
   {
       /*declare variables */
       int numProperties;
       double totalPropertyCost=0;
       int counter=0;
       final double PROPERTY_TAX=0.10; //Set 10 % =0.1 as property tax
      
       /*Prompt for number of properties */
       numProperties=Integer.parseInt(JOptionPane.showInputDialog(null, "Enter the number of properies :"));
       /*create an array of double type */
       double[] cost_array=new double[numProperties];

       String userInput="";

       do
       {
           //prompt for the cost of the property
           userInput=JOptionPane.showInputDialog(null, "Enter the cost of the property :"+(counter+1));
           if(userInput.equals("E"))
               break;
           else
           {
               //Parset the user input to double and add assign the tot the cost array
               cost_array[counter]=Double.parseDouble(userInput);
               //calcuate the tax on the property cost
               totalPropertyCost+=cost_array[counter]*PROPERTY_TAX;
               //increment the counter by 1
               counter=counter+1;
           }
          
       }while(!userInput.equals("E") &&counter<numProperties);

       /*Display the total property tax on the message dialog window*/
       JOptionPane.showMessageDialog(null, "TOTAL amount of all property tax combined:$"+Math.round(totalPropertyCost),
               "Property Cost",
               JOptionPane.INFORMATION_MESSAGE);
   } //end of the main method
} //end of the java program

--------------------------------------------------------*--------------------------------------------------------

Sample Output: