016 抽象クラス（抽象メソッドと具象メソッド） 009 解答例

// 抽象クラス Employee
abstract class Employee {
    // 抽象メソッド calculateSalary を宣言
    public abstract double calculateSalary();
}

// 具象クラス Manager
class Manager extends Employee {
    private double baseSalary;
    private double bonus;

    // コンストラクタ
    public Manager(double baseSalary, double bonus) {
        this.baseSalary = baseSalary;
        this.bonus = bonus;
    }

    // calculateSalary メソッドの実装
    @Override
    public double calculateSalary() {
        return baseSalary + bonus;
    }
}

// 具象クラス Developer
class Developer extends Employee {
    private double hourlyRate;
    private int hoursWorked;

    // コンストラクタ
    public Developer(double hourlyRate, int hoursWorked) {
        this.hourlyRate = hourlyRate;
        this.hoursWorked = hoursWorked;
    }

    // calculateSalary メソッドの実装
    @Override
    public double calculateSalary() {
        return hourlyRate * hoursWorked;
    }
}

// メインクラス
public class Main {
    public static void main(String[] args) {
        // Manager クラスの利用例
        Manager manager = new Manager(50000, 10000);
        System.out.println("Manager's Salary: $" + manager.calculateSalary());

        // Developer クラスの利用例
        Developer developer = new Developer(25, 160);
        System.out.println("Developer's Salary: $" + developer.calculateSalary());
    }
}

Manager's Salary: $60000.0
Developer's Salary: $4000.0