Array_of_objects_inheritance.java

/*
  Here, the concept of java inheritance is implied by using constructors,objects and using
  array of objects.
  Most of the code available on inheritance and not based on array of objects method and 
  hence is not sufficient to cover the overall concepts related to inheritance method. This
  will also help you in familiarising array of objects method which is very beneficial for
  working with java.
*/

import java.util.Scanner;

class Employee
{
    String Name,Phonenumber,Address;
    int Age,Basicpay,HouseRentAllowance,TravelAllowance,Bonus,PensionFund,Insurance,IncomeTax;
    int deduction,addition,totalsalary,netsalary;
    
    Scanner sc = new Scanner(System.in);
    
    Employee()
    {
        System.out.print("\nName : ");
        this.Name = sc.nextLine();
        System.out.print("\nAge : ");
        this.Age = sc.nextInt();
        sc.nextLine();
        System.out.print("\nPhone number : ");
        this.Phonenumber = sc.nextLine();
        /*System.out.print("\nBasic pay : ");
        this.Basicpay = sc.nextInt();*/
        System.out.print("\nAddress : ");
        this.Address = sc.nextLine();
    }
    void calculate_salary()
    {
        HouseRentAllowance = Basicpay * 5/100;
        TravelAllowance = Basicpay * 3/100;
        Bonus  =  Basicpay * 2/100;
        PensionFund = Basicpay * 10/100;
        Insurance = Basicpay * 3/100; //Insurance amount is user choice.Here considered as 3% of Basic pay.
        IncomeTax = Basicpay * 5/100;
        deduction = PensionFund+IncomeTax+Insurance;
        addition = HouseRentAllowance+TravelAllowance+Bonus;
        totalsalary = Basicpay+addition;
        netsalary = totalsalary-deduction;
    }
    
    void print_salary()
    {
        System.out.println("\nSalary details of "+Name+"\n");
        System.out.println("Basic pay : "+Basicpay);
        System.out.println("House Rent Allowance : "+HouseRentAllowance);
        System.out.println("Travel Allowance : "+TravelAllowance);
        System.out.println("Bonus : "+Bonus);
        System.out.println("Pension Fund : "+PensionFund);
        System.out.println("Insurance : "+Insurance);
        System.out.println("Income Tax : "+IncomeTax);
        System.out.println("Salary Addition: "+addition);
        System.out.println("Salary Deduction: "+deduction);
        System.out.println("Total Salary: "+totalsalary);
        System.out.println("Net Salary: "+netsalary);
    }
    
    void display()
    {
        System.out.println("Name : "+this.Name);
        System.out.println("Age : "+this.Age);
        System.out.println("Phone number : "+this.Phonenumber);
        System.out.println("Address : "+this.Address);
    }
}

class Officer extends Employee
{
    String Specialization;
    Officer()
    {
        super();
        System.out.print("\nBasic pay : ");
        Basicpay = sc.nextInt();
        sc.nextLine();
        System.out.print("\nSpecialization : ");
        Specialization = sc.nextLine();
    }
    void display()
    {
        super.display();
        System.out.println("Specialization : "+this.Specialization);
        super.calculate_salary();
    }
}

class Manager extends Employee
{
    String Department;
    Manager()
    {
        super();
        System.out.print("\nBasic pay : ");
        Basicpay = sc.nextInt();
        sc.nextLine();
        System.out.print("\nDepartment : ");
        Department = sc.nextLine();
    }
    void display()
    {
        super.display();
        System.out.println("Department : "+this.Department);
        super.calculate_salary();
    }
}

public class Main
{
    public static void main(String args[])
    {
        int i,n,m;
        Scanner sc = new Scanner(System.in);
        
        System.out.println("Enter the number of Officers : ");
        n = sc.nextInt();
        Officer []officers = new Officer[n];
        System.out.println("\n  Enter Details of officers...");
        for(i=0;i<n;i++)
        {
            System.out.println("\nDetails of officer "+(i+1));
            Officer temp = new Officer();
            officers[i] = temp;
        }
        
        System.out.println("\nEnter the number of Managers : ");
        m = sc.nextInt();
        Manager []managers = new Manager[m];
        System.out.println("\n  Enter Details of managers...");
        for(i=0;i<m;i++)
        {
            System.out.println("\nDetails of manager "+(i+1));
            Manager temp = new Manager();
            managers[i] = temp;
        }
        
        System.out.println("\n\tEmployee Profile...");
        System.out.println("\n  Officer Details...\n");
        for(i=0;i<n;i++)
        {
            System.out.println("\nOfficer "+(i+1));
            officers[i].display();
            officers[i].print_salary();
        }
        System.out.println("\n  Manager Details...\n");
        for(i=0;i<m;i++)
        {
            System.out.println("\nManager "+(i+1));
            managers[i].display();
            managers[i].print_salary();
        }
    }
}