Java: concerning nested classes

Question

I have a few classes I need: Score, Course, and handicap. The file is "handicap.java", thus the main class is "handicap".

If I try and nest the Score class or the Course class inside of the "handicap" class, I receive this error upon trying to instantiate an instance of either class:

handicap.java:129: non-static variable this cannot be referenced from a static context
                        Score sc = new Score(score, course);
                                   ^
handicap.java:141: put(java.util.GregorianCalendar,Score) in java.util.Map<java.util.GregorianCalendar,Score> cannot be applied to (java.util.GregorianCalendar,handicap.Score)
                        g.scores.put(greg, sc);

If I add "static" to the Score class declaration, I still receive the second error. Help?

The Code is here: http://pastebin.com/CvT1SCvb

the code is not complete ..lots of missing stuff .. structure it so that its easier to debug — user1428716
– user1428716, Commented Jan 26, 2014 at 5:18

Leo · Accepted Answer · 2014-01-26 05:12:59Z

1

take a look on this

public class Handicap {

    public class Score{

    }

    public static class ScoreStatic{

    }

    public static void main(String[] args) {
        Handicap h = new Handicap();
        h.method();
        new Handicap.ScoreStatic();
    }

    public void method(){
        new Handicap.Score();
    }
}

answered Jan 26, 2014 at 5:12

Leo

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Comments

user1428716 · Accepted Answer · 2014-01-26 05:08:50Z

0

By the looks of it , you are getting compilation error.

Please read about the Nested Classes : http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html

This is the way it works :

    public class handicap{
    public static void main(String... args) {
         handicap st = new handicap();
         handicap.Score fl = st.new Score();

     }

    class Score{
      //blah
     }

   }

answered Jan 26, 2014 at 5:08

user1428716

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