this is my first attempt in creating a java program with a purpose. it is a primitive calculator. I need your guidance to improv

Question

https://code.sololearn.com/cw1dp63T3k5L/?ref=app

Answer 1

//here are some improvements ☺
//u can use 1 object of scanner class , to take multiple inputs

import java.util.Scanner;
public class Calc
{
public static void main(String[] args) {

Addition a = new Addition();
Subtraction s = new Subtraction();
Multiplication multi = new Multiplication();
Division d = new Division();

Scanner m = new Scanner(System.in);
double x,y,z=0;
char c;
while(true)
{
System.out.println("Enter 2 numbers:");
x = m.nextDouble();
y = m.nextDouble();

System.out.println("Enter operator:");
c = m.next().charAt(0);

if(c == '+')
z = a.add(x,y);

else if(c == '-')
z = s.sub(x,y);

else if(c == '*'||c=='×')
z = multi.mul(x,y);

else if(c == '/'||c=='÷')
z = d.div(x,y);
else{
System.out.println("Your choice is not is available");
System.exit(0);}
System.out.println(x+" "+c+" "+y+" = "+ z);
}
}
}

public class Addition
{
double add(double x,double y)
{
return x+y;
}
}

public class Subtraction
{
double sub(double x,double y)
{
return x-y;
}
}

public class Multiplication
{
double mul(double x,double y)
{
return x*y;
}
}

public class Division
{
double div(double x,double y)
{
return x/y;
}
}