Java switch calculator pro

Coding of calculator programme using switch case in java

import java.io.*;

public class calculator

{
public static void main(String[] args) throws Exception

{
int x, y;
BufferedReader b = new BufferedReader(new InputStreamReader(System.in)) ;
System.out.println("Enter two numbers for operation:");
x = Integer.parseInt(b.readLine());
y = Integer.parseInt(b.readLine());
System.out.println("1. Add");
System.out.println("2. Subtract");
System.out.println("3. Multiply");
System.out.println("4. Divide");
System.out.println("enter your choice:");
int a= Integer.parseInt(b.readLine());
switch (a)

{
case 1:
System.out.println("Enter the number one=" + (x+y));
break;
case 2:
System.out.println("Enter the number two=" + (x-y));
break;
case 3:
System.out.println("Enetr the number three="+ (x*y));
break;
case 4:
System.out.println("Enter the number four="+ (x/y));
break;
default:
System.out.println("Invalid Entry!");
     }
  }
}

Calculator using Switch

public class calculator

{

public static void main (String [] args)

{

    Scanner sc=new Scanner(System.in);

    int a,b;

    char p='+';

    char m='-';

    char multi='*';

    char div='/';

    String character;   

       System.out.print("enter ur firt value : ");

        a=sc.nextInt();

        System.out.print("enter ur second value : ");

        b=sc.nextInt();

        System.out.print("enter ur operator +,-,*,/ : ");

        character=sc.nextLine();

          switch(p){

            case '+':

                System.out.print(a+b);

                break;

      }

    }   

}

 

Simple calculator using switch case statement in java

import java.util.Scanner;

public class calculator

{
 public static void main(String[] args)

{

  Scanner s=new Scanner(System.in);
  System.out.println("You have following choices : ");
  System.out.println("1. Addition");
  System.out.println("2. Subtraction ");
  System.out.println("3. Multiplication ");
  System.out.println("4. Division");
  System.out.println("Enter your choice : ");
  int i=s.nextInt();
 
  System.out.println("Enter first number ");
  int a=s.nextInt();
 
  System.out.println("Enter second number ");
  int b=s.nextInt();
  double result=0;
  switch(i)
  {
  case 1:
   result=a+b;
   break;
  case 2:
   result=a-b;
   break;
  case 3:
   result=a*b;
   break;
  case 4:
   if(b==0)
   {
    System.out.println("Division not possible");
    break;
   }
   else
    result=a/b;
  default:
   System.out.println("You have entered a wrong choice");
   }
   System.out.println("Result = "+result);
 }
}