Question

Write a program called GasPrice.java that defines a named constant to represent the price of gas per gallon for
regular gas, and a second named constant for the price per gallon of premium gas. Prompt the user to input how
much gas they need. Calculate the cost of purchasing each option (using those constants) and save the results in
two variables. Finally, output the results. Be sure to include test cases as shown earlier in this

Answer 1

Answer:

Certainly! Here's a simple Java program named GasPrice.java that follows your requirements:

java

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import java.util.Scanner;

public class GasPrice {

   // Named constants for gas prices

   private static final double REGULAR_GAS_PRICE = 3.00;   // Replace with the actual price for regular gas

   private static final double PREMIUM_GAS_PRICE = 3.50;   // Replace with the actual price for premium gas

   public static void main(String[] args) {

       // Prompt user to input how much gas they need

       Scanner scanner = new Scanner(System.in);

       System.out.print("Enter the amount of gas needed (in gallons): ");

       

       // Read user input for gas amount

       double gasAmount = scanner.nextDouble();

       // Calculate the cost for regular and premium gas

       double regularGasCost = REGULAR_GAS_PRICE * gasAmount;

       double premiumGasCost = PREMIUM_GAS_PRICE * gasAmount;

       // Output the results

       System.out.println("Cost of Regular Gas: $" + regularGasCost);

       System.out.println("Cost of Premium Gas: $" + premiumGasCost);

       // Close the scanner

       scanner.close();

   }

}

Make sure to replace the placeholder values for REGULAR_GAS_PRICE and PREMIUM_GAS_PRICE with the actual prices for regular and premium gas.

You can test the program by compiling and running it. It will prompt you to enter the amount of gas needed and then display the cost for both regular and premium gas

Explanation: