Solution Review: Implement a Calculator Class

class Calculator {
  
  // Class fields
  private double num1;
  private double num2;
  // Default Constructor
  public Calculator(double num1, double num2) {
    this.num1 = num1;
    this.num2 = num2;
  }
  // Addition Method
  double add() {
    return this.num1 + this.num2;
  }
  // Subtraction Method
  double subtract() {
    return this.num2 - this.num1;
  }
  // Multiplication Method
  double multiply() {
    return this.num1 * this.num2;
  }
  // Divison Method
  double divide() {
    return this.num2 / this.num1;
  }
  
}
class Demo {
  public static void main(String args[]) {
    Calculator obj = new Calculator(10, 94);
    System.out.println(obj.add());
    System.out.println(obj.subtract());
    System.out.println(obj.multiply());
    System.out.println(obj.divide());
  }
}