Java 상속 예제

EX_01. 월급 계산 프로그램

1-1. Employee

package 월급계산프로그램;

public abstract class Employee {

	String empno;
	String name;
	int pay;
	
	public Employee(String empno, String name, int pay) {
		this.empno = empno;
		this.name = name;
		this.pay = pay;
	}
	//time temp regular가 공통적으로(기능) 가지고 있는 메소드
	public String print() {
		return empno+":"+name+":"+pay;
	}
	//getmoneypay
	//각 클래스에서 {}(body)가 다르게 구현되어야 합니다
	//추상 메서드
	//부모를 물렬받는 자식이라면 누구든 모조건 써야하는 메소드
	public abstract int getMoneyPay();

	}

1-2. PartTimeEmployee

package 월급계산프로그램;

public class PartTimeEmployee extends Employee{
	int workDay;
	
	public PartTimeEmployee(String empno, String name, int pay, int workDay) {
		super(empno, name, pay);
		this.workDay = workDay;
	}

	@Override
	public int getMoneyPay() {
		return (pay*workDay);
	}
}

1-3. RegularEmployee

package 월급계산프로그램;

public class RegularEmployee extends Employee{

	public int bonus;
	//생성자
		public RegularEmployee(String empno, String name, int pay, int bonus) {
		super(empno, name, pay);
		this.bonus = bonus;
	}
	//기능
	@Override
	public int getMoneyPay() {
		return (pay+bonus)/12;
	}
}

1-4.TempEmployee

package 월급계산프로그램;

public class TempEmployee extends Employee{
	
	public TempEmployee(String empno, String name, int pay) {
		super(empno, name, pay);
	}

	@Override
	public int getMoneyPay() {
		return (pay/12);
	}
}

1-5. Main

 

package 월급계산프로그램;

public class Main {

	public static void main(String[] args) {

		RegularEmployee regular = new RegularEmployee("SMHRD001","홍길동",4000,400);
		
		System.out.println(regular.print());
		System.out.println(regular.getMoneyPay()+"만원");
		
		PartTimeEmployee parttime = new PartTimeEmployee("SMHRD003","임성훈",10,10);
		System.out.println(parttime.print());
		System.out.println(parttime.getMoneyPay()+"만원");
		
		TempEmployee temp = new TempEmployee("SMHRD002", "박문수", 3000);
		System.out.println(temp.print());
		System.out.println(temp.getMoneyPay()+"만원");
	}

}