What will be the output of the following Java code?
public class Shape
{
public int area()
{
return 1;
}
}
public class Square extends Shape
{
public int area()
{
return 2;
}
}
public class Rectangle extends Shape
{
public int area()
{
return 3;
}
}
class Main()
{
public static void main(String[] args)
{
Shape shape = new Shape();
Square square = new Square();
Rectangle rect = new Rectangle();
rect = (Rectangle)square;
System.out.println(square.area());
}
}
public class Shape
{
public int area()
{
return 1;
}
}
public class Square extends Shape
{
public int area()
{
return 2;
}
}
public class Rectangle extends Shape
{
public int area()
{
return 3;
}
}
class Main()
{
public static void main(String[] args)
{
Shape shape = new Shape();
Square square = new Square();
Rectangle rect = new Rectangle();
rect = (Rectangle)square;
System.out.println(square.area());
}
}A. Compilation failure
B. 3
C. Runtime Exception
D. 2
Answer: Option A
This Question Belongs to Java Program >> Java Autoboxing
A. The automatic conversion of primitive types to their corresponding wrapper classes
B. The process of creating a new box
C. A feature for manually converting wrapper classes to primitive types
D. A feature for boxing objects
Which primitive type corresponds to the `Integer` wrapper class in Java?
A. `char`
B. `boolean`
C. `float`
D. `int`
What is the primary benefit of autoboxing in Java?
A. It improves memory management
B. It reduces code complexity
C. It simplifies code by automatically converting between primitive types and their corresponding wrapper classes
D. It speeds up code execution
In Java, which classes are used for autoboxing and unboxing operations?
A. Exception classes (e.g., `RuntimeException`)
B. Wrapper classes (e.g., `Integer`, `Double`)
C. Collection classes (e.g., `ArrayList`, `HashMap`)
D. Exception classes (e.g., `RuntimeException`)
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