Question

Assume we have this:

Point pt = new Point2D(true, 1.0, 1.0);

A few of the lines below cause problems. Identify which lines, and describe the problems. (To clarify: each line causes at most one problem.) System.out.println(pt.getVisibility()); System.out.println((Point2D)pt.getRadius()); System.out.println(((Point2D)pt).getRadius()); System.out.println(((Point2D)pt).radius);

Answer 1

System.out.println((Point2D)pt.getRadius()); - this line give error

because getRadius function will return radius means it will return a integer or double or float kind of variable , but we are type casting that integer or double or float to Point2D so it will give error because object double/float/int cannot be typecast to any object.

error: incompatible types: double/int/float cannot be converted to Point2D

System.out.println(pt.getVisibility()); - this getVisibility function will work fine and will return the visibility

System.out.println(((Point2D)pt).getRadius()); - this getRadius function will return the radius , here in this case we are not typecasting int/double/float to Point2D object , so it will work fine
System.out.println(((Point2D)pt).radius); - this radius function will give the radius , here in this case we are not typecasting int/double/float to Point2D object , so it will work fine

pls do give a like , thank you.