Chapter 8.2, Problem 17STQ

Explanation of Solution

a.

Given line:

Person p1 = new Student ();

Explanation:

The “Person” and “Student” are two classes. The class “Student” is the derived class and “Person” is the base class...

Explanation of Solution

b.

Given line:

Person p2 = new Undergraduate ();

Explanation:

The “Person” and “Undergraduate” are two classes...

Explanation of Solution

c.

Given line:

Student s1 = new Person ();

Explanation:

The “Person” and “Student” are two classes. The class “Student” is the derived class and “Person” is the base class...

Explanation of Solution

d.

Given line:

Student s2 = new Undergraduate ();

Explanation:

The “Undergraduate” and “Student” are two classes. The class “Undergraduate” is extend from the “Student” class...

Explanation of Solution

e.

Given line:

Undergraduate ug1 = new Person ();

Explanation:

The “Undergraduate” and “Person” are two classes. The class “Undergraduate” is extend from the “Student...

Explanation of Solution

f.

Given line:

Undergraduate ug2 = new Student ();

Explanation:

The “Undergraduate” and “Person” are two classes. The class “Undergraduate” is extend from the “Student...

Program Plan Intro

g.

“Object” class:

All classes in Java inherit from the “Object” class.

• • Directly and indirectly all classes are inherited from the “Object”class.
• • Some of the basic methods of the “Object” class are listed below:
  • ○ clone()
  • ○ toString()
  • ○ equals()

The above methods are automatically created in java when a class is created.

Program Plan Intro

h.

“Object” class:

All classes in Java inherit from the “Object” class.

• • Directly and indirectly all classes are inherited from the “Object”class.
• • Some of the basic methods of the “Object” class are listed below:
  • ○ clone()
  • ○ toString()
  • ○ equals()

The above methods are automatically created in java when a class is created.