"Java Hierarchical Inheritance: Mastering Object-Oriented Programming!" смотреть онлайн

#coding
Hierarchical Inheritance
The type of inheritance in which more than one derived class inherits the properties of the same base class is called hierarchical inheritance. There are multiple child classes and a single parent class. All the child classes will inherit the methods and fields present in the parent class. The general form and figures are given below.
Syntax:
package singleinheritance;

class A{
//fields and methods of A
}
class B extends A{
//fields and methods of B
}

public class C extends A{
//fields and methods of C
}

The figure of Hierarchical Inheritance


Example: Complete program in Java for Hierarchical Inheritance
package singleinheritance;

class Employee1{
double salary=5000;
void displaySalary() {
System.out.println("Employee Salary:Rs."+salary);
}
}
class FullTimeEmployee extends Employee1{
float bonus=0.50f;
void incrementSalary() {
salary=salary+(salary+bonus);
}
}
class InternEmployee extends Employee1{
float bonus=0.25f;
void incrementSalary() {
salary=salary+(salary*bonus);
}
}
public class MainClass {
public static void main(String[] args) {
FullTimeEmployee emp1=new FullTimeEmployee();
InternEmployee emp2=new InternEmployee();
System.out.println("Salary of full-time employee before increment");
emp1.displaySalary();
System.out.println("Salary of an intern before incrementing");
emp2.displaySalary();

emp1.incrementSalary();
emp2.incrementSalary();
System.out.println("Salary of a full-time employee after incrementing:");
emp1.displaySalary();
System.out.println("Salary of an intern after incrementing:");
emp2.displaySalary();
}

}


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