a)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
interface A
{
//declaration of function
void print() { };
}
b)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
abstract interface A
{
//declaration of function
abstract void print() { };
}
c)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
abstract interface A
{
//declaration of function
print() { };
}
d)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
interface A
{
//declaration of function
Void print();
}
e)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
interface A
{
//declaration of function
default void print() { }
}
f)
Abstract class:
An abstract class is a class which may or may not include abstract methods and cannot be instantiated but rather can be sub classed.
Interface:
Interface is a reference type in Java, which contains a collection of abstract methods.
An interface needs to follow certain conditions such as:
- One cannot instantiate an interface.
- Interfaces do not contain any constructors.
- All methods present in the interface are abstract.
- An interface does not contain any instance field.
- An interface cannot be extended by a class.
Given code:
//interface declaration
interface A
{
//declaration of static function
static int get
{
//return value
return 0;
}
//Close interface
}
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Check out a sample textbook solutionChapter 13 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
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