Java assignment I have to clean up my calculator program using methods and I have to use Pascal instead of Camel. As soon as I changed int choice = getmenuoption(); I was given a message that says cannot switch on a value of type double. What can I use to get this to work?

import java.util.Random; import java.util.Scanner;

public class CalculatorWithMethods {

// scanner object creation static Scanner input = new Scanner(System.in); boolean mainloop = true;

public static void main(String[] args) {

//Declaring variables double res;

//calling the method double choice = getMenuOption();

switch (choice) { case 1: { //calling the method to get the operands double operand1 = getOperand("What is the first number?"); double operand2 = getOperand("What is the second number?"); res = add(operand1, operand2); System.out.println(operand1 + " + " + operand2 + " = " + res); break; } case 2: { //calling the method to get the operands double operand1 = getOperand("What is the first number?"); double operand2 = getOperand("What is the second number?"); res = subtract(operand1, operand2); System.out.println(operand1 + " - " + operand2 + " = " + res); break; } case 3: { //calling the method to get the operands double operand1 = getOperand("What is the first number?"); double operand2 = getOperand("What is the second number?"); res = multiply(operand1, operand2); System.out.println(operand1 + " * " + operand2 + " = " + res); break; } case 4: { //calling the method to get the operands double operand1 = getOperand("What is the first number?"); double operand2 = getOperand("What is the second number?"); if (operand2 == 0) { System.out.println("The Second Number is Double.NAN."); } else { //calling the method to get the operands operand1 = getOperand("What is the first number?"); operand2 = getOperand("What is the second number?"); res = divide(operand1, operand2); System.out.println(operand1 + " / " + operand2 + " = " + res); } break; } case 5: { double operand1 = getOperand("What is the lower limit ?"); double operand2 = getOperand("What is the upper limit ?"); res = random(operand1, operand2); System.out.println("The Random Number is :" + res); break; } } }

//This method will perform the add operation public static double add(double operand1, double operand2) {

return operand1 + operand2; }

//This method will perform the subtract operation public static double subtract(double operand1, double operand2) {

return operand1 - operand2; }

//This method will perform the multiply operation public static double multiply(double operand1, double operand2) { return operand1 * operand2; } //This method will perform the division operation public static double divide(double operand1, double operand2) {

return operand1 / operand2; } //This method returns the random number public static double random(double x, double y) { Random generator = new Random();

return generator.nextInt((int)(y - x) + 1) + x; }

//This method will get the operands entered by the user public static double getOperand(String str) {

System.out.print(str); double num = input.nextDouble(); return num; }

//This method will display the menu public static double getMenuOption() {

double choice;

// user interaction until quit performed. while (true) {

// displaying menu System.out.println(" Menu 1. Add 2. Subtract 3. Multiply 4. Divide 5. Generate Random Number 6. Quit");

// ask user choice System.out.println("What would you like to do?");

choice = input.nextInt();

if (choice < 1 || choice > 5) { System.out.println("** Invalid Choice **"); continue; } else { return choice; } } } }