java extends

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package distance;

/**
 *
 * @author t1406g_nvbang
 */
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */


public class showResult {
    public static void main(String[] args) {
        Manager quanLy = new Manager("Nguyen Viet Bang", 10, 100);
        System.out.println(quanLy.calculatepay());

        Scientist nhaKhoaHoc = new Scientist("Nguyen Tan dung", 20000, 10);
        System.out.println(nhaKhoaHoc.calculatepay());

        Laborer congNhan = new Laborer("Ho chi minh", 2000000, 40);
        System.out.println(congNhan.calculatepay());

    }
}
class Employee {
    protected String name;
    protected double salary;
    public Employee (String eName, double eSalary) {
        name = eName;
        salary = eSalary;
    }
    public double calculatepay() {
        return 0;
    }
}

class Manager extends Employee {
    private double business_amount;
    public Manager(String mName, double mSalary, double mBusinessAmount) {
        super(mName, mSalary);
        business_amount = mBusinessAmount;
    }
    @Override
    public double calculatepay() {
        double total_pay;
        double commission;
        if (business_amount > 50000) {
            commission = business_amount/10;
        } else {
            commission = business_amount/20;
        }
        total_pay = salary + commission;
        return total_pay;
    }

}

//class
class Scientist extends Employee {
    private int publication;
    public Scientist(String sName, double sSalary, int sPublication) {
        super(sName,sSalary);
        publication = sPublication;
    }
    @Override
    public double calculatepay() {
        double total_pay;
        total_pay = salary;
        if (publication > 25) {
            total_pay += salary/5;
        }
        else {
            total_pay += salary/10;
        }
        return total_pay;
    }
}

//class
class Laborer extends Employee {
    private int hrsworked;
    public Laborer (String lName, double lSalary, int lHrsWorked) {
        super(lName, lSalary);
        hrsworked = lHrsWorked;
    }
    @Override
    public double calculatepay() {
        double total_pay;
        total_pay = salary;
        if (hrsworked > 50) {
            total_pay += salary/100*15;
        } else {
            total_pay += salary/100*8;
        }
        return total_pay;
    }
}