What is printed?

public class Inherit
{

abstract class Figure
{
void display( )
{
System.out.println("Figure");
}
}

abstract class Rectangle extends Figure
{
}

class Box extends Rectangle
{
void display( )
{
System.out.println("Rectangle");
}
}

Inherit( )
{
Figure f = (Figure) new Box( );
f.display( );
Rectangle r = (Rectangle) f;
r.display( );
}

public static void main(String[ ] args)
{
new Inherit( );
}
}

A) Rectangle
Rectangle
B) Rectangle
Figure
C) Figure
Rectangle
D) Figure
Figure
E) none of the above

Question

What is printed?

public class Inherit
	{

abstract class Figure
		{
			void display( )
			{
				System.out.println("Figure");
			}
		}

abstract class Rectangle extends Figure
		{
		}

class Box extends Rectangle
		{
			void display( )
			{
				System.out.println("Rectangle");
			}
		}

Inherit( )
		{
			Figure f = (Figure) new Box( );
			f.display( );
			Rectangle r = (Rectangle) f;
			r.display( );
		}

public static void main(String[ ] args)
		{
			new Inherit( );
		}
	}

A) Rectangle
Rectangle 
B) Rectangle
Figure 
C) Figure
Rectangle 
D) Figure
Figure 
E) none of the above

Quizplus · Accepted Answer

A) "f" is a polymorphic reference variable, as is "r." Trace through the inheritance structure to see that both references' invocation of the display( ) method will, indeed, display "Rectangle."

What Is Printed