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Thread: Java abstract

  1. #1
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    Default Java abstract

    Could someone help me figure out what am I missing? It not printing out "Math" in my main class. Thanks

    public abstract class Homework
    {   
        private int pagesRead; 
        private String typeHomework;
     
        public Homework()
        {
            pagesRead = 0 ;
            typeHomework = "";
        }
        public void setPage(int page)
        {
            pagesRead = page;
        }
     
        public int getPage()
        {
            return pagesRead;
        }
     
     
        public void setType(String type)
        {
            typeHomework = type;
        }
     
        public String getType()
        {
            return typeHomework;
        }
     
        public abstract void createAssignment(int p);
     
     
    }

    public class MyMath extends Homework
    {
        public MyMath()
        {
        }
     
        public void createAssignment(int p)
        {
            setPage(p);
            setType("Math");    
        }
     
        public String toString()
        {
            return getType() + " - " + getPage();
        }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Java abstract

    Where is the main class, what is the name of the main class and where are the methods that are supposed to cause "Math" to be printed.

    There is no main() method in the posted code. A main() method is needed to be able to start execution of a class with the java command.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java abstract

    public class testHomework
    {
        public static void main(String[]args)
    {
            MyMath math = new MyMath();
     
     
            System.out.println(math.toString());
     
        }
    }

  4. #4
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    Default Re: Java abstract

    What prints out when the code is executed? Why do you expect anything different to be printed?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java abstract

    It print out nothing. Since I "setType("Math"); " won't it print out "Math"?

  6. #6
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    Default Re: Java abstract

    It print out nothing
    Are you sure? This line must print something:
    System.out.println(math.toString());

    In what method is setType("Math") called? Then where is that method called?
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: Java abstract

    I forgot about calling the method, I thought it would call itself for some reason. Thanks you so much!

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