Thread: Help for simple calculator code

This code wont work for some reason. For example when i input 4+7 it says that it's 108.

import java.util.Scanner;
 
public class myCalculator {
    public static void main(String[] args) {
        Scanner Calculator = new Scanner(System.in);
 
        System.out.println("Plese input equation. NO DOUBLE DIGITS!");
        String calculator = Calculator.next();
 
        char[] op = calculator.toCharArray();
 
        switch(op[1]){
            case('+'):
            double stuff = (op[0] + op[2]);
            System.out.println(stuff);
            break;
 
            case('-'):
            double stuff0 = (op[0] - op[2]);
            System.out.println(stuff0);
            break;
 
            case('*'):
            double stuff1 = (op[0] * op[2]);
            System.out.println(stuff1);
            break;
 
            case('/'):
            double stuff2 = (op[0] / op[2]);
            System.out.println(stuff2);
            break;
 
            default:
            System.out.println("ERROR");
        }
    }
}

wont work for some reason.

Please explain what "wont work" means: compiler error, execution error or wrong results.
Copy the contents of the console and paste it here that shows the problem and add some comments.

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