Can't get java calculator to work

[name]

Hi,
I am trying to write a calculator application that when it works, it would ask the user what operation they would like, then would perform the operation on two inputed numbers (e.x. input: add, ,input: 1, input: 2, output: 3). so far, I havent been able to get the program to compile because I get 5 error messages regarding the switch statement (I have attached a screenshot of the error messages) when I try to compile. I can't continue writing the code until I can resolve this issue. here is the code:

import java.io.*;
import java.util.*;
import java.text.*;

public class calculator{
    public static void main(String []args) throws IOException{

        System.out.println("Input operation:");

        //ask for operation
        int operation;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        int temp;
        do
        {
            int temp = in.readLine();
            operation = Integer.valueOf(temp).intValue();
            switch(operation) {

                case 1:
                    System.out.println(" ");
                    System.out.println("First number:");
                    double num1 = in.readline();

                    System.out.println(" ");
                    System.out.println("Second number:");
                    double num2 = in.readline();

                    double product = num1 + num2;
                    System.out.println(" ");
                    System.out.println("Product:");
                    System.out.println(product);
            }
        } while(true);
    }
}

If you find anthing else of concern, please tell me

Thanks

[JosAH]

The method readLine() returns a String representing the line that was just read; you are trying to assign that String to an int or a double. b.t.w. note the capital ell (L) in 'readLine'

kind regards,

Jos

[name]

Thanks for the help, I should be able to figure this out now.

[name]

I tried what you said, but it didn't work. I got a new error (which i attached to this post) and I still don't know what to do. Can someone help?

here is what i tried:

import java.io.*;
import java.util.*;
import java.text.*;

public class calculator{
    public static void main(String []args) throws IOException{

        System.out.println("Input operation:");

        //ask for operation
        String operation;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String temp;
        do
        {
            String temp = in.readLine();
            operation = String.valueOf(temp).StringValue();
            switch(operation) {

                case 1:
                    System.out.println(" ");
                    System.out.println("First number:");
                    double num1 = in.readline();

                    System.out.println(" ");
                    System.out.println("Second number:");
                    double num2 = in.readline();

                    double product = num1 + num2;
                    System.out.println(" ");
                    System.out.println("Product:");
                    System.out.println(product);
            }
        } while(true);
    }
}

Thanks

[Dark]

The method readLine() returns a String representing the line that was just read; you are trying to assign that String to an int or a double. b.t.w. note the capital ell (L) in 'readLine'

kind regards,

Jos

Did you correct this? I see that your readlines are not exactly the same in each error line.

Lets look at your first error. temp is already defined in a Java class. How do we get around this problem?