EDITED : ALREADY DONE THANKS GUYS

Hello guys am just a newbie. I need to put this calculator with switch in a function. I need to convert it to void function (if that's what it is called). It already worked but the thing is it runs twice. I just putted addition to make my code short but I need it with other operations as well. If anyone know please post it. Here is my code:

```
import java.io.*;

public class Cal {

  static char Switch() throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("\n\n");
    System.out.println("1]Addition");
    System.out.println("2]Subtraction");
    System.out.println("3]Multiplication");
    System.out.println("4]Division");
    System.out.print("\nEnter Your Choice : ");
    char r = br.readLine().charAt(0);

    switch (r) {
      case '1':
        Add1();
        Add2();
        break;
      default:
        System.out.print("Error");
        break;

    }
    return r;
  }

  static int Add1() throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    System.out.println("\nAddition");
    System.out.print("enter 1st # : ");
    int x = Integer.parseInt(br.readLine());
    return x;
  }

  static int Add2() throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.print("enter 2nd # : ");
    int y = Integer.parseInt(br.readLine());
    return y;

  }

  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int y;
    int x;
    char r;
    r = Switch();
    x = Add1();
    y = Add2();
    System.out.print("\nSum " + (x + y));

  }
}

```