Thread: Java Abstract class and Interface issues in a code

I have following code:

package prototype;
public interface Refill
{
public static final int TYPE_BALL=1;
public static final int TYPE_GEL=2;
public int getType();
public int getPrice();
}
 
public abstract class Pen
{
public static final int TYPE_REFILLABLE=1;
public abstract int getType();
public abstract Refill getRefill();
public   int getPrice();
}
 
public abstract class PushablePen extends Pen
{
public int state;
public static final int STATE_NORMAL=1;
public static final int STATE_PUSHED=2;
public static final int TYPE_PUSHABLE=2;
public static final int TYPE_ REFILLABLE _PUSHABLE=3;
public abstract  void push();
public abstract getState();
}

The classes are on different files with their names in 'Prototype'.
I have another package 'Luxar' having following:

package luxar;
import prototype.Refill;
 
 
public class BallRefill implements Refill 
{
	public int getType()
	{
	-------
	}
 
	public int getPrice()
	{
	---------
	}
}

and there is a similar class GelRefill.In the same package sub class of Pen by the name P1 and a subclass of PushablePen, by the name P2.
Now i am trying to test the above with a class in another package 'Tester' which tests:


1)Price of Pen> Price of refill
2)For pushable pen the states alternate between Pushed & Normal.
3)Warning message if a Non-Pushable pen is pushed.
Can anyone help me with these?

Thanks,
J