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Thread: Newbie questions about lesson on class implementation

  1. #1
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    Talking Newbie questions about lesson on class implementation

    Hey everybody,
    I have been learning Java onlin for about a week now.
    here is the program I am trying to get to work
    class OfficeLights {
     
          char Status = Off;
          char Status = On;
          void changeStatus(char newValue) {
               status = newValue;
          }
     
          void printStates() {
               System.out.println("Status:"+Status);
          }
    } 
     
    class CoffeeMug {
     
          char lid = Open;
          char Lid = Closed;
          char Contents = Empty;
          char Contents = Coffee;
          char Contents = Tea; 
     
          void changeLid(char newValue) {
               lid = newValue;
          }
     
          void changeContents(char newValue) {
               Contents = newValue;
          }
     
          void printStates() {
               System.out.println("lid:"+lid+" Contents:"+Contents);
          }
    }
     
    class OfficeLightsCoffeeMug {
        public static void main(String[] JD) {
     
     
          OfficeLights light1 = new OfficeLights();
     
          light1.changeStatus(On);
          light1.printStates();
     
     
          CoffeeMug mug1 = new CoffeeMug();
     
          mug1.changeLid(Closed);
          mug1.changeContents(Coffee);
          mug1.printStates();
          }
    }
    It wont compile, I get 14 error messages.
    I have attached a screenshot of the errors I am getting when I try to compile.
    Any advice on this particular program &| some newbie tips/advice in general would be very welcome,
    Thanks!
    P.S. I hope this is the right topic to post under, sorry if I commited a faux pas...


  2. #2
    Administrator copeg's Avatar
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    Default Re: Newbie questions about lesson on class implementation

    For starters,
    char Status = Off;
    is not a proper statement. char is a primitive whose syntax is:
    char status = 'o';

    If you just want something to store an off/on value, look into using a boolean
    For more information on primitives which will help you fix your errors, see Primitive Data Types (The Java™ Tutorials > Learning the Java Language > Language Basics)

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