Question

I am trying to profile a ann algorithm written in Java that is implemented as a generic abstract class and I cant figure out how to instance it.

Eclipse gives me error “Cannot instantiate the type KdTree” which is not very helpful. Any ideas on how to instance this class so I can test it?

Class defination and constructor:

public abstract class KdTree<T> {    
    private KdTree(int dimensions, Integer sizeLimit) {
        this.dimensions = dimensions;
    }
}

My attempt to instance it:

public class test_robo {
    public void run_test() 
    {
        KdTree<Integer> tree = new KdTree<Integer>(1,1);
    }
}

link to the full code for KdTree
http://robowiki.net/wiki/User:Rednaxela/kD-Tree

Answer 1

First of all, you cannot instantiate an abstract class.

I saw the code in the link you provided; there are few implementations of the base class KdTree<T> already in there.

1. WeightedSqrEuclid
2. WeightedManhattan
   …

If that’s not what you’re looking for, extend the base class and implement all those abstract methods as you wish.