DynamicDispatch.java

public class DynamicDispatch {
  
	interface GeometricValue {
		void intersects(GeometricValue v);
	}
	
	static class Point implements GeometricValue {
		@Override
		public void intersects(GeometricValue v) {
			throw new UnsupportedOperationException();
		}
		
		public void intersects(Point p) {
			System.out.println("Testing intersection with Point");
		}
		
		public void intersects(Line l) {
			System.out.println("Testing intersection with Line");
		}
		
	}
	
	static class Line implements GeometricValue {
		@Override
		public void intersects(GeometricValue v) {
			throw new UnsupportedOperationException();
		}
		
	}
	
	public static void main(String args[]) {
		new Point().intersects(new Line()); // => Testing intersection with Line
		
		GeometricValue p = new Point();
		GeometricValue l = new Line();
		p.intersects(l); // => throws UnsupportedOperationException
	}
	
}