Java code to create a calculator

Here is a simple Java code to create a basic calculator that can perform addition, subtraction, multiplication, and division:

import java.util.Scanner;

public class Calculator {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.println("Enter the first number:");
double num1 = input.nextDouble();

System.out.println("Enter the second number:");
double num2 = input.nextDouble();

System.out.println("Choose the operation (+, -, *, /):");
char operator = input.next().charAt(0);

double result;

switch(operator) {
case '+':
result = num1 + num2;
break;

case '-':
result = num1 - num2;
break;

case '*':
result = num1 * num2;
break;

case '/':
result = num1 / num2;
break;

default:
System.out.println("Invalid operator!");
return;
}

System.out.println(num1 + " " + operator + " " + num2 + " = " + result);
}
}