Question

Please help and please satisfy the directions. The directions are under program 3.

port JavaScore. public class Example 4 [ public static int getint String strum - JOptionPane.showinput Dialog("Enter an integer"); return integer.parseInt(strum): public static void main(String args Scanner input = new Scanner (System.in): System.out.println("Enter 2 integers"); intx input.nextInt(); inty input.nextInt(): 1/ these are simple is if b ) System.out.println("The first number is positive): if (0 y0) System.out.println("Both numbers are positive"); ( 11 y) System.out.println("At least one number is positive"); of Do ) System.out.println("The first number is positive: else System.out.println("The first number is not positive": If x y ) System.out.println("At least one number is positive"); else System.out.printf(Both numbers are negative: Product 3d", xyl: I now we use the method x-getinte y - getinti: if (x0) if (y) System.out.println("Both are positive"); else System.out.println("First number is positive, Second not positive": else System.out.println("First not positive, Second don't know); If you have more than one statement in an if you must use braces. if (xc0){ System.out.println("First number not positive"): X = - X; // make x not negative The braces indicate that you want both statements executed as part of the if. Some books call this a block or compound statement. Either way, the braces are required when there is more than one statement. Program 3 Using Eclipse, write a program that first asks the user to enter three real numbers using GUI input. Print the sum if all three numbers are positive, print the product of the two positive numbers if only one is negative - use one nested if. Then, ask the user to enter two real numbers from the console. If both numbers are negative, print the quotient. All output should be to a dialog and the console. console output must be done using printf and format specifiers. Use meaningful variable names, informative prompts and label your output. Write a method getFloat to al numbers. This should be similar to the method getint above. Good program structure, indentation, a heading and comments are required. Points will be deducted for any program not meeting the requirements.

Answer 1

Here is the completed code for this problem. 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

// Program3.java

import java.util.Scanner;

import javax.swing.JOptionPane;

public class Program3 {

    // method to read and return a real number using GUI

    static float getFloat() {

         String input = JOptionPane.showInputDialog("Enter a real number: ");

         return Float.parseFloat(input);

    }

    public static void main(String[] args) {

         // reading three real numbers using GUI

         float a = getFloat();

         float b = getFloat();

         float c = getFloat();

         // checking if all three are positive, assuming 0 is also positive

         if (a >= 0 && b >= 0 && c >= 0) {

             // displaying the sum of numbers using both GUI and console

             JOptionPane.showMessageDialog(null,

                      String.format("Sum of all three numbers is: %.2f", (a + b + c)));

             System.out.printf("Sum of all three numbers is: %.2f\n", (a + b + c));

         }

         // otherwise checking if only one number is negative and other two are

         // positive

         else if ((a < 0 && b >= 0 && c >= 0) || (b < 0 && c >= 0 && a >= 0)

                 || (c < 0 && a >= 0 && b >= 0)) {

             //using a nested if, finding out which number is negative

             if (a < 0) {

                 //a is negative, displaying product of b and c

                 JOptionPane.showMessageDialog(null, String.format(

                          "Product of two positive numbers is: %.2f", (b * c)));

                 System.out.printf("Product of two positive numbers is: %.2f\n",

                          (b * c));

             } else if (b < 0) {

                 //b is negative, displaying product of a and c

                 JOptionPane.showMessageDialog(null, String.format(

                          "Product of two positive numbers is: %.2f", (a * c)));

                 System.out.printf("Product of two positive numbers is: %.2f\n",

                          (a * c));

             } else {

                 //c is negative, displaying product of a and b

                 JOptionPane.showMessageDialog(null, String.format(

                          "Product of two positive numbers is: %.2f", (a * b)));

                 System.out.printf("Product of two positive numbers is: %.2f\n",

                          (a * b));

             }

         }

        

         //declaring a Scanner, reading two real numbers from console

         Scanner scanner = new Scanner(System.in);

         System.out.println("Enter two real numbers: ");

         float d = scanner.nextFloat();

         float e = scanner.nextFloat();

         //if both are negative, displaying their quotient

         if (d < 0 && e < 0) {

             JOptionPane.showMessageDialog(null, String.format(

                      "Quotient of these numbers is: %.2f", (d / e)));

             System.out.printf("Quotient of these numbers is: %.2f", (d / e));

         }

    }

}

/*OUTPUT (in the order of their appearance)*/

Input Enter a real number: 10 OK Cancel

Input Enter a real number: OK Cancel

Input Enter a real number: 11 OK Cancel

Message U Product of two positive numbers is: 110.00 TOK

Product of two positive numbers is: 110.00 Enter two real numbers: -9 -0.51

Message 0 Quotient of these numbers is: 18.00 OK

Product of two positive numbers is: 110.00 Enter two real numbers: -9 -0.5 Quotient of these numbers is: 18.00