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P. 211
CAVITE STATE UNIVERSITY
T3 CAMPUS
Department of Information Technology COSC 65 – Programming Languages
Employee Programmer
salary : double bonus : int
As displayed in the above figure, Programmer is the subclass and Employee is the
superclass. The relationship between the two classes is Programmer IS-A Employee. It
means that Programmer is a type of Employee.
class Employee {
double salary = 40000.00;
}
public class Programmer extends Employee { // by using ‘extends’ keyword, you can inherit
int bonus = 1000; // the properties of class Employee
}
Public class TestInheritance {
public static void main(String[]args){
Programmer Programmer1 = new Programmer();
System.out.println(“Programmer’s Salary is: “ + Programmer1.salary);
System.out.println(“Programmer’s Bonus is: “ + Programmer1.bonus);
} }
Types of Inheritance in Java
On the basis of class, there can be three types of inheritance in java: single, multilevel
and hierarchical.
Class_A
Class_A Class_A
3. Hierarchical
1. Single 2. Multilevel
Class_B Class_B
Class_B Class_C
Class_C
In Java Programming, multiple and hybrid inheritance is supported through interface
only. We will learn about interfaces later.
Note: Multiple inheritance is not supported in Java through classes.
When one class inherits multiple classes, it is known as multiple inheritance.
Class_B Class_C Class_A
5. Hybrid
4. Multiple
Class_B Class_C
Class_A
Class_A
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