ID3 Java Enum Tree

Question

I\'m trying to make a non-binary learning tree that\'s a simplified version of the ID3 algorithm. To do this, I tried to use enums, because there are several references teachin

Answer 1

I had a similar problem, building an hierarchy of enums. But in my case, an hierarchy of classes could also do the trick. In case you are interested here is my post: How to build an hierarchy tree of categories in java using enums or any other way?

Now, concerning only enum hierarchy, as you can see on my post, I found this that may work for you:

http://alexradzin.blogspot.hk/2010/10/hierarchical-structures-with-java-enums_05.html

In particular:

public enum OsType {
OS(null),
    Windows(OS),
        WindowsNT(Windows),
            WindowsNTWorkstation(WindowsNT),
            WindowsNTServer(WindowsNT),
        Windows2000(Windows),
            Windows2000Server(Windows2000),
            Windows2000Workstation(Windows2000),
        WindowsXp(Windows),
        WindowsVista(Windows),
        Windows7(Windows),
        Windows95(Windows),
        Windows98(Windows),
    Unix(OS) {
            @Override
            public boolean supportsXWindows() {
                return true;
            }
        },
        Linux(Unix),
        AIX(Unix),
        HpUx(Unix),
        SunOs(Unix),
;
private OsType parent = null;

private OsType(OsType parent) {
    this.parent = parent;
}

I hope it helps!

Answer 2

you can add a child class to features:

import java.util.*;
interface hasEnumChildren {
    Class clazz();
}
enum fuelstats {
    notempty,empty
}
enum lightstatus {
    Dim,Normal
}
enum scents {
    normal,gas
}
enum soundstatus {
    Normal,Howl,Screech,Click
}
enum turn {
    no,yes
}
enum problems {
    battery,starter,solenoid,outofgas,flooding
}
enum features implements hasEnumChildren {
    lightstatus(lightstatus.class),soundstatus(soundstatus.class),fuelstats(fuelstats.class),scents(scents.class),turn(turn.class),problems(problems.class);
    features(Class clazz) {
        this.clazz=clazz;
    }
    final Class clazz;
    @Override public Class clazz() {
        return clazz;
    }
}
public class So10233099 {
    public static void main(String[] args) {
        System.out.println(Arrays.asList(features.lightstatus.clazz().getEnumConstants()));
    }
}