Question

Help getting my code to run.

public class BusinessClass {

    // Length
    public static double inTOcm(double inches) {
        return 2.54 * inches;
    }public static double inTOmeter(double inches) {
            return 0.0254 * inches;
    }public static double inTOft(double inches) {
        return 0.083333 * inches;
    }public static double inTOyd(double inches) {
        return 0.0277778 * inches;
    }public static double inTOkm(double inches) {
        return 0.000254 * inches;
    }public static double ftTOmeter(double feet) {
        return 0.3048 * feet;
    }public static double ftTOyd(double feet) {
        return 0.0003048 * feet;
    }public static double ftTOkm(double feet) {
        return 0.33333 * feet;
    }public static double ftTOmiles(double feet) {
        return 0.000189394 * feet;
    }public static double ydTOmeter(double yard) {
        return 0.914 * yard;
    }public static double ydTOft(double yard) {
        return 3.0 * yard;
    }public static double ydTOkm(double yard) {
        return 0.00091444 * yard;
    }public static double ydTOmile(double yard) {
        return 0.000568182 * yard;

}

}

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public class MeasuementClassCalculationsTest
{
    public static void main(String[] args)
    {

        // Scanner object for keyboard input
        Scanner keyboardInput = new Scanner(System.in);

        // Prompt the user to select an option
        System.out.println("\nType an option to perform the operation\n" +
                "   Option 1:  Calculate inches\n" +
                "   Option 2:  Calculate feet\n" +
                "   Option 3:  Calculate yards\n" +
                "   Option 4: End the Program\n");

        optionSelected = keyboardInput.nextInt();
        keyboardInput.nextLine();  //Consume enter key

        while (optionSelected != 4)
        {
            switch(optionSelected)
            {
                case 1:
                  Calculate cal=new Calculate(inches);

                    System.out.println("\nOunces: "+cal.inTOcm());
                    System.out.println("\nKilograms: "+cal.inTOmeter());
                    System.out.println("\nOunces: "+cal.inTOft());
                    System.out.println("\nOunces: "+cal.inTOyd());
                    System.out.println("\nOunces: "+cal.inTOkm());
                    System.out.print("\n");
                    break;

                case 2:
                    Calculate cal=new Calculate(feet);

                    System.out.println("\nOunces: "+cal.ftTOmeter());
                    System.out.println("\nKilograms: "+cal.ftTOyd());
                    System.out.println("\nOunces: "+cal.ftTOkm());
                    System.out.println("\nOunces: "+cal.ftTOmiles());
                    System.out.print("\n");
                    break;

                case 3:
                    Calculate cal=new Calculate(yard)
                    System.out.println("\nOunces: "+cal.ydTOmeter());
                    System.out.println("\nKilograms: "+cal.ydTOft());
                    System.out.println("\nOunces: "+cal.inTOkm());
                    System.out.println("\nOunces: "+cal.inTOmile());
                    System.out.print("\n");
                    break;

                case 4:
                    break;

                default:
                    System.out.println("Enter a number from 1 to 4 only ");

            } // End of the switch statement

            // Prompt the user to select an option
            System.out.println("\nType an option to perform the operation\n" +
                    "   Option 1:  Calculate inches\n" +
                    "   Option 2:  Calculate feet\n" +
                    "   Option 3:  Calculate yards\n" +
                    "   Option 4: End the Program\n");

            optionSelected = keyboardInput.nextInt();
            keyboardInput.nextLine();

        }
    }


            }

Answer 1

Hello,

Here is the code, I have modified your MeasuementClassClaculationsTest. java to MeasurementClassCalculationsTest.java. There was a reference that you were making to a class called Calculate, it was supposed to be the reference of BusinessClass. Your BusinessClass.java has been retained as is. There has been no constructors with args in BusinessClass.java. However, for some reason I could see that you were trying to pass the parameter while instantiation. I have corrected that, please take a look. Also, I have a double variable called inputValue being introduced and is passed across all the methods. In addition, 3 objects are created cal1, cal2, cal3. Now, the program is running fine, I am also enclosing the screenshots for your reference.

MeasurementClassCalculationsTest.java

import java.util.Scanner;

public class MeasurementClassCalculationsTest
{
    public static void main(String[] args)
    {

        // Scanner object for keyboard input
        /*
        
        Variable inputValue is the once which is passed across all the methods below
        Change the value of it whenever needed
        
         */
        double inputValue = 10; // I am giving input as 10, you can change it to whatever you want
        Scanner keyboardInput = new Scanner(System.in);

        // Prompt the user to select an option
        System.out.println("\nType an option to perform the operation\n" +
                "   Option 1:  Calculate inches\n" +
                "   Option 2:  Calculate feet\n" +
                "   Option 3:  Calculate yards\n" +
                "   Option 4: End the Program\n");

        int optionSelected = keyboardInput.nextInt();
        keyboardInput.nextLine();  //Consume enter key

        while (optionSelected != 4)
        {
            switch(optionSelected)
            {
                case 1:
                    BusinessClass cal1=new BusinessClass(); // Creating an obj - cal1

                    System.out.println("\nOunces: "+cal1.inTOcm(inputValue));
                    System.out.println("\nKilograms: "+cal1.inTOmeter(inputValue));
                    System.out.println("\nOunces: "+cal1.inTOft(inputValue));
                    System.out.println("\nOunces: "+cal1.inTOyd(inputValue));
                    System.out.println("\nOunces: "+cal1.inTOkm(inputValue));
                    System.out.print("\n");
                    break;

                case 2:
                    BusinessClass cal2=new BusinessClass(); // Creating an obj - cal2

                    System.out.println("\nOunces: "+cal2.ftTOmeter(inputValue));
                    System.out.println("\nKilograms: "+cal2.ftTOyd(inputValue));
                    System.out.println("\nOunces: "+cal2.ftTOkm(inputValue));
                    System.out.println("\nOunces: "+cal2.ftTOmiles(inputValue));
                    System.out.print("\n");
                    break;

                case 3:
                    BusinessClass cal3=new BusinessClass(); // Creating an obj - cal3
                    System.out.println("\nOunces: "+cal3.ydTOmeter(inputValue));
                    System.out.println("\nKilograms: "+cal3.ydTOft(inputValue));
                    System.out.println("\nOunces: "+cal3.ydTOkm(inputValue));
                    System.out.println("\nOunces: "+cal3.ydTOmile(inputValue));
                    System.out.print("\n");
                    break;

                case 4:
                    break;

                default:
                    System.out.println("Enter a number from 1 to 4 only ");

            } // End of the switch statement

            // Prompt the user to select an option
            System.out.println("\nType an option to perform the operation\n" +
                    "   Option 1:  Calculate inches\n" +
                    "   Option 2:  Calculate feet\n" +
                    "   Option 3:  Calculate yards\n" +
                    "   Option 4: End the Program\n");

            optionSelected = keyboardInput.nextInt();
            keyboardInput.nextLine();

        }
    }

}

--------------------------------------------------------------------------------------------------

BusinessClass.java

THIS CLASS HAS BEEN RETAINED WITHOUT ANY CHANGES, HENCE NO COMMENTS/ EXPLANATION GIVEN

public class BusinessClass {

    // Length
    public static double inTOcm(double inches) {
        return 2.54 * inches;
    }public static double inTOmeter(double inches) {
        return 0.0254 * inches;
    }public static double inTOft(double inches) {
        return 0.083333 * inches;
    }public static double inTOyd(double inches) {
        return 0.0277778 * inches;
    }public static double inTOkm(double inches) {
        return 0.000254 * inches;
    }public static double ftTOmeter(double feet) {
        return 0.3048 * feet;
    }public static double ftTOyd(double feet) {
        return 0.0003048 * feet;
    }public static double ftTOkm(double feet) {
        return 0.33333 * feet;
    }public static double ftTOmiles(double feet) {
        return 0.000189394 * feet;
    }public static double ydTOmeter(double yard) {
        return 0.914 * yard;
    }public static double ydTOft(double yard) {
        return 3.0 * yard;
    }public static double ydTOkm(double yard) {
        return 0.00091444 * yard;
    }public static double ydTOmile(double yard) {
        return 0.000568182 * yard;
    }

}

Thank you,

All the best !!!