SE450: Types: Interface as Type 1 [23/47] Previous pageContentsNext page

file:types/point3/Main.java [source] [doc-public] [doc-private]
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package types.point3;
import java.awt.Color;
interface Point {
  double getX();
  double getY();
}
final class CartesianPoint implements Point {
  /* ... */
}
final class PolarPoint implements Point {
  /* ... */
}
public class Main {
  private Main() {}
  public static void main(String[] args) {
    CartesianPoint p1 = new CartesianPoint(0,0,Color.RED);
    CartesianPoint q1 = new CartesianPoint(1,1,Color.BLUE);
    PolarPoint r1 = new PolarPoint(0,0,Color.RED);

    Point p2 = p1;
    Point q2 = q1;
    Point r2 = r1;
  }
}

What are the types of p2, q2, r2?

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