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Thread: Newbie questions about lesson on class implementation

  1. #1
    Junior Member
    Join Date
    Apr 2010
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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() {
    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();
          CoffeeMug mug1 = new CoffeeMug();
    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,
    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
    Join Date
    Oct 2009
    Thanked 833 Times in 772 Posts
    Blog Entries

    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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