Question

This same solution except that you need to use the Dialog boxes option instead of Scanner class option

Planting Grapevines

A vineyard owner is planting several new rows of grapevines, and needs to know how many grapevines to plant in each row. She has determined that after measuring the length of a future row, she can use the following formula to calculate the number of vines that will fit in the row, along with the trellis end-post assemblies that will need to be constructed at each end of the row:

            

The terms in the formula are:

V is the number of grapevines that will fit in the row.

R is the length of the row, in feet.

E is the amount of space used by an end-post assembly, in feet.

S is the space between vines, in feet.

Write a program that makes the calculation for the vineyard owner. The program should ask the user to input the following:

The length of the row, in feet

The amount of space used by an end-post assembly, in feet

The amount of space between the vines, in feet

My current code is

public class Main {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

double R, E, S;
int V;
System.out.printf(" Enter the length of the Row(in Feet) ");
R=sc.nextDouble();
System.out.printf(" Enter the amount of space used by end post assembly(in Feet) ");
E=sc.nextDouble();
System.out.printf(" Enter the amount of space between the vines(in Feet) ");
S=sc.nextDouble();
V = (int)((R - (2.0*E)) / S);
if (V < 0) //Validate of the entered values are correct
System.out.printf("Error!!.. Seems you have not entered one of avalues correct.");
else
System.out.printf(" Number of grape wines that will fit in the row would be %d", (int)V); //Converting from decimal to Int since the number of vines will be in whole number.
  
}
}

Answer 1

Here is the completed code for this problem. Just changed all input/output to use JOptionPane dialog boxes only, changed nothing else. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

// Main.java

import javax.swing.JOptionPane;

public class Main {

      public static void main(String[] args) {

            double R, E, S;

            int V;

            // reading input using JOptionPane window and converting to double

            R = Double.parseDouble(JOptionPane

                        .showInputDialog("Enter the length of the Row(in Feet)"));

            E = Double

                        .parseDouble(JOptionPane

                                    .showInputDialog("Enter the amount of space used by end post assembly(in Feet)"));

            S = Double

                        .parseDouble(JOptionPane

                                    .showInputDialog("Enter the amount of space between the vines(in Feet)"));

            V = (int) ((R - (2.0 * E)) / S);

            if (V < 0) // Validate of the entered values are correct

            {

                  // displaying output using JOptionPane window

                  JOptionPane

                              .showMessageDialog(null,

                                           "Error!!.. Seems you have not entered one of avalues correct.");

            }

            else {

                  // displaying output using JOptionPane window

                  JOptionPane.showMessageDialog(null,

                              "Number of grape wines that will fit in the row would be "

                                           + (int) V);

            }

      }

}

/*OUTPUT*/

Input Enter the length of the Row(in Feet) ? 100 Cancel OK X

Input Enter the amount of space used by end post assembly(in Feet) ? 201 OK Cancel

Input X Enter the amount of space between the vines(in Feet) ? Cancel OK LO

Message Ci Number of grape wines that will fit in the row would be 12 ок X