Accessing abstract class variables via the implentation class

[Chris Stabler]

I have an abstract class that has a few classes and variables but i am having issues with these variables being "seen" by the implentation class.

  public abstract class DataClass extends Thread {	

	public class DataShape {

		public double totalArea = 0.0;
		public Area outerRing;
		public Vector<Area> inner_rings;
		public double cutoffArea = 0.0;
		public double value = 0.0;
	}  

.....

}

**Implementation Class**

   public class OpenMapPlugin extends DataClass{

....some implementation functions


DataShape shape = new DataShape();
shape.outerRing = someRing; <<<----Produces the following error below.

} 

java.lang.NoSuchFieldError: outerRing

so my question is is that how come the implementation class cannot see a member of a class that is inside my base class? Area is just a class from the java.awt.geom class.

thanks for your help in advance.

[Matthew Brown]

outerRing != outRing

Is it as straightforward as that, or is that a mistake in your posting?

[Chris Stabler]

Matthew Brown wrote:outerRing != outRing

Is it as straightforward as that, or is that a mistake in your posting?

mistake in posting - i will correct

[Alex Hurtt]

shape.outRing ??

[Lino Larios]

Hi

Ive run the code that i can see but i can get such error.


regards

[Campbell Ritchie]

Chris Stabler wrote:mistake in posting - i will correct

You ought to have left it unchanged; now you have changed it nobody can understand the replies.

And why have you got public fields in your classes. That looks like bad design to me.

[Paul Clapham]

Campbell Ritchie wrote:And why have you got public fields in your classes. That looks like bad design to me.

Likewise having classes which are for graphic type things extending Thread...

[Abimaran Kugathasan]

How do you access the member class of your super class? The implementation class can see the member class of the super class as usual like any other non-private members. Check the code below.

import java.util.*;

abstract class DataClass extends Thread {

	public class DataShape {

		public double totalArea = 0.0;
		//public Area outerRing;
		public Vector inner_rings;
		public double cutoffArea = 0.0;
		public double value = 0.0;
	}

}

public class TestAbstract extends DataClass	{
	public static void main(String[] args)	{
		TestAbstract t = new TestAbstract();
		t.m();
	}
	void m()	{
		DataShape s = new DataShape();
		s.totalArea = 12.4;
	}
}