Question

I am working on this switch statement code and I am getting errors. Please help.

import java.util.Scanner;
public class Switchstatement {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
}

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

   int choice;
   Double Yen, UsDollars, Kilometer, Miles, Kilograms, Pounds, Inches;
Double Centimeters, result;
  
   Scanner scanner = new Scanner(System.in);
   System.out.print("Enter 1\t UsDollars to Yen: ");
   Yen = scanner.nextDouble(0);
   System.out.print("Enter 2\t Kilograms to Pounds: ");
Kilograms = scanner.nextDouble;
System.out.print("Enter 3\t Miles to Kilometers: ");
Miles = scanner.nextDouble;
System.out.print("Enter 4\t Inches to Centmeter: ");
Inches = scanner.nextDouble;   
  
  
   Yen = scanner.nextDouble();
   UsDollars = scanner.nextDouble();
Kilograms = scanner.nextDouble();
Pounds = scanner.nextDouble();
Miles = scanner.nextDouble();
Inches = scanner.nextDouble();
  
   switch (Convertor) {
case 1:
result = UsDollar * Yen;
   System.out.print("UsDollars "*" Yen + " = " + result+);
break;

case 2:

result = Kilograms * Pounds;
System.out.print("Kilograms + "*" + Pounds + " = " + result");
break;

case 3:
result = Miles * Kilometers;
System.out.print(Miles + "*" + Kilometers + " = " + result);
break;

case 4:
result = Inches * Centimeters;
System.out.print(Inches + "/" + Centimeters + " = " + result);
break;

default:
System.out.println("Invalid entry!");
break;
}   

Answer 1

import java.util.Scanner;

/*
public class Switchstatement {
* @param args the command line arguments

public static void main(String[] args) { //There can be one main in the program
}
*/

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

int choice;
Double Yen, UsDollar, Kilometer, Miles, Kilograms, Pounds, Inches;
Double Centimeters, result;
  
Scanner scanner = new Scanner(System.in);
/*
System.out.print("Enter 1\t UsDollars to Yen: ");
UsDollar = 1.0;
Yen = scanner.nextDouble();
System.out.print("Enter 2\t Kilograms to Pounds: ");
Pounds = 1.0;
Kilograms = scanner.nextDouble();
System.out.print("Enter 3\t Miles to Kilometers: ");
Miles = scanner.nextDouble();
Kilometer = 1.0;
System.out.print("Enter 4\t Inches to Centmeter: ");
Inches = scanner.nextDouble();   
Centimeters = 1.0;
  
*/

System.out.println("MENU");
System.out.println(" 1\t UsDollars to Yen: ");
System.out.println(" 2\t Kilograms to Pounds: ");
System.out.println(" 3\t Miles to Kilometers: ");
System.out.println(" 4\t Inches to Centmeter: ");
System.out.println(" Enter your choice");
choice = scanner.nextInt();
  
/*
//YOU HAVE ALREADY READ THE VALUES ABOVE
Yen = scanner.nextDouble();
UsDollars = scanner.nextDouble();
Kilograms = scanner.nextDouble();
Pounds = scanner.nextDouble();
Miles = scanner.nextDouble();
Inches = scanner.nextDouble();
*/

switch (choice) { //Instead of converter use the choice variable that you have declared above

case 1:
System.out.println("Enter number of Usdollars");
UsDollar = scanner.nextDouble();
System.out.println("Enter rate of UsDollar to Yen");
Yen = scanner.nextDouble();
result = UsDollar * Yen;
System.out.print(UsDollar + " * " + Yen + " = " + result + "\n");
break;

case 2:
System.out.println("Enter number of Kilograms");
Kilograms = scanner.nextDouble();
System.out.println("Enter rate of Kilogram to Pounds");
Pounds = scanner.nextDouble();
result = Kilograms * Pounds;
System.out.print(Kilograms + " * " + Pounds + " = " + result+ "\n");
break;

case 3:
System.out.println("Enter number of Miles");
Miles = scanner.nextDouble();
System.out.println("Enter rate of Miles to Kilometer");
Kilometer = scanner.nextDouble();
result = Miles * Kilometer;
System.out.print(Miles + " * " + Kilometer + " = " + result + "\n");
break;

case 4:
System.out.println("Enter number of Inches");
Inches = scanner.nextDouble();
System.out.println("Enter rate of Inches to Centimeter");
Centimeters = scanner.nextDouble();
result = Inches * Centimeters;
System.out.print(Inches + " * " + Centimeters + " = " + result + "\n");
break;

default:
System.out.println("Invalid entry!");
break;
}
scanner.close();
}
}

COMMENT DOWN FOR ANY QUERY

PLEASE GIVE A THUMBS UP