age and weight

      double age;
        double weight;
        
        try {
            age = Double.parseDouble(ageTextFeild.getText());
            weight =  Double.parseDouble(weightTextFeild.getText());
        }
        catch (NumberFormatException e) {
            age = -1;
            weight =-1;
        }
        
        if (age < 0 && weight < 0) {
            resultLabel.setText(INPUT_ERROR);
        }
        
        else if (age >= 17 && weight >= 100) {
            resultLabel.setText(ELIGIBLE);
        }
        
        else {
            resultLabel.setText(NOT_ELIGIBLE);
        }