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Thread: "Help with answer to question from java 6 practice exam book!

  1. #1
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    Default "Help with answer to question from java 6 practice exam book!

    "Hi When faced with this question, I really gave up trying to work out what was going on and have given up in despair!
    Can you explain whats going on?
    Line 3 The 'singleton' identifier was very distracting, whats it doing? and the use of SafeDeposit just about everywhere has further confused me can anyone walk me through this code segment please"

    class SafeDeposit {
     
       private static SafeDeposit singleton;
     
       public static SafeDeposit getInstance(int code) {
     
        if(singleton == null)
          singleton = new SafeDeposit(code);
         return singleton;
    }
     
       private int code;
       private SafeDeposit(int c){code = c;}
       int getCode() {return code;}
    }
     
    public class BeSafe {
       //insert lots of code here
    }
    Last edited by Norm; November 14th, 2013 at 04:01 PM. Reason: Removed spaces in code tag


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    Default Re: "Help with answer to question from java 6 practice exam book!

    singleton on line 3 is the name of a variable of type SafeDeposit

    SafeDeposit is the name of a class.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default "Trying to understand question from java exam prep book"

    Quote Originally Posted by StanTheMan
    When faced with this question, I really gave up trying to work out what was going on can someone explain whats going on?
    line3 The 'singleton' identifier was very distracting, whats it doing? and the use of SafeDeposit just about everywhere further confused me. Could someone explain what is happening here please
    [code = java]
    class SafeDeposit {

    private static SafeDeposit singleton;

    public static SafeDeposit getInstance(int code) {

    if(singleton == null)
    singleton = new SafeDeposit(code);
    return singleton;
    }

    private int code;
    private SafeDeposit(int c){code = c;}
    int getCode() {return code;}
    }

    public class BeSafe {
    //insert lots of code here
    }[/code]

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    Default Re: "Trying to understand question from java exam prep book"

    Why are you reposting this? Continue the discussion in your original post on this topic.

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