cannot find symbol in java method

Question

cal.java

package calculator;
class Cal
{
    public int add(int num1,int num2)
    {
        return num1+num2;
    }
    public int mul(int num1,int num2)
    {
        return num1*num2;
    }
    public int sub(int num1,int num2)
    {
        return num1-num2;
    }
    public int div(int num1,int num2)
    {
        return num1/num2;
    }

}

Final.java

import calculator.*;
import java.util.*;
public class Final
{
    public static void main(String[] args)
    {
        Scanner in= new Scanner(System.in);
        System.out.println("What operation would you like to perform? press 1 for add \n press 2 for sub \n press 3 for mul \n press 4 for divide\n");
        Integer s=in.nextInt();
        System.out.println("What is the first number?");
        Integer n1=in.nextInt();
        System.out.println("What is the second number you want to enter?");
        Integer n2=in.nextInt();
        Cal obj=new Cal();
        switch(s)
        {
            case 1:
            System.out.println(obj.add(n1+n2));
            break;
            case 2:
            System.out.println(obj.sub(n1-n2));
            break;
            case 3:
            System.out.println(obj.mul(n1*n2));
            break;
            case 4:
            System.out.println(obj.div(n1/n2));
            break;
        }
    }
}

I am trying to make a calculator using java packages and i keep getting these error

**calculator\\Final.java:14: error: cannot find symbol**
Cal obj=new Cal();
^
symbol:   class Cal
location: class Final
calculator\\Final.java:14: error: cannot find symbol
Cal obj=new Cal();
^
symbol:   class Cal
location: class Final
2 errors

Answer 1

class Cal has no visibility modifier (public, private, or protected), so it's defaulting to the seldom-used package-private visibility, which means it can only be seen in the current package and nowhere else. Declare it as

public class Cal { ... }

and you'll be able to see it.