자바 로또 번호 생성 게임예제02

-LottoMain

public class LottoMain {
    public static void main(String[] args) {
        MC mc = new MC();
        mc.mentStart();
    }
}
 

-MC

import java.util.Arrays;
 
public class MC {
    private int[] ball = new int[7];
    
    public void mentStart() {
        System.out.println("로또 추첨을 시작합니다.");
        
        Machine machine = new Machine();
        machine.start();
                
        System.out.println("볼을 꺼냅니다.");
        for (int i = 0; i<=6; i++) {
            ball[i] = machine.getBall();
            System.out.println(i+1 + "번째 볼은" + ball[i] + "번 입니다.");
        }
        System.out.println("오늘의 당첨 번호는 " + Arrays.toString(ball));
    }
}

-Machine

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
public class Machine {
    private List<Ball> balls = new ArrayList<Ball>();
    private int cnt = 0;
    
    public Machine() {
        for(int i = 1; i <= 45; i++) {
            Ball ball = new Ball();
            ball.setNumber(i);
            balls.add(ball);
        }
    }
    
    public void start(){
        Collections.shuffle(balls);
    }
    
    public int getBall() {
        return balls.get(cnt++).getNumber();
    }
}

-Ball

public class Ball {
    private int number;
    public Ball(){}
    public int getNumber() {
        return number;
    }
    public void setNumber(int number) {
        this.number = number;
    }
}