1_5 자바 객체지향 실습(회원관리 프로그램)

클래스 다이어그램

메인

package mycom.mytest;

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Userinfo user1 = new Userinfo(1, "홍길동", "20120212", 3);
        user1.display();

        Userinfo user2 = new Userinfo(2, "김길동", "20120812", 2);
        user2.display();

        Userinfo user3 = new Userinfo(3, "이길동", "20130112", 10);
        user3.display();

        Userinfo user4 = new Userinfo(4, "박길동", "20110912", 11);
        user4.display();

        Userinfo user5 = new Userinfo(5, "최길동", "20100712", 6);
        user5.display();

        Userinfo user6 = new Userinfo(6, "한길동", "20120112", 8);
//        user6.setPurchase(11);
        user6.display();

    }

}

클래스

package mycom.mytest;

public class Userinfo {
    private int id;
    private String name;
    private String date;
    private int purchase;
    private int score;
    private String grade;

    public Userinfo(int id, String name, String date, int purchase) {
        super();
        this.id = id;
        this.name = name;
        this.date = date;
        this.purchase = purchase;
        this.score = score_cal(this.purchase);
        this.grade = grade_cal(this.score);
    }


    // 점수 계산
    public int score_cal(int purchase) {
        //score
        if(purchase < 3) {
            return purchase * 20;
        } else if(purchase >= 3) {
            return purchase * 30;
        } else if(purchase >= 5 && purchase <= 10) {
            return purchase * 50;
        } else {
            return purchase * 100;
        }
    }


    // 등급 계산
    public String grade_cal(int score) {
        //grade
        if(this.score < 100) {
            return "Family";
        } else if(this.score < 300) {
            return "Gold";
        } else if(this.score < 500) {
            return "VIP";
        } else {
            return "VVIP";
        }
    }

    public void display() {
        System.out.println(this.id + "\t" + this.name + "\t" + this.date + "\t" + this.purchase + "\t" + this.score + "\t" + this.grade + "\t");
    }


    public int getScore() {
        return this.score;
    }


    public String getGrade() {
        return this.grade;
    }


    public void setPurchase(int purchase) {
        if(purchase > 0) {
            this.purchase = purchase;
            this.score = score_cal(this.purchase);
            this.grade = grade_cal(this.score);

        } else {
            System.out.println("잘못된 입력입니다.");
        }
    }


}