[JAVA] 로또 당첨 & 모든 경우의 수 출력

import java.util.Scanner;

public class Lmain {

	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		int[] myNum = new int[6];
		int bonus;
		Lotto lotto = new Lotto();
		for(int i =0; i<myNum.length;i++) {
			System.out.print(i+1+"번 번호를 입력해주세요 : ");
			myNum[i] = sc.nextInt();
		}
		
		lotto.findMy(myNum);
	}
}

import java.util.HashSet;
import java.util.Iterator;
import java.util.Random;
import java.util.Scanner;

public class Lotto {
	Scanner sc = new Scanner(System.in);
		Random rand = new Random();
		private HashSet<Integer> win = new HashSet<Integer>();
		private Iterator<Integer> it = win.iterator();
		private int bonus;
		private int menu;
		
		Lotto(){
			do {
				win.add(rand.nextInt(45)+1);
				if(win.size() == 6)
					break;
			}while(true);
	
			do {
				bonus = rand.nextInt(45)+1;
			}while(win.contains(bonus));
			
			System.out.print("1등번호 : " + win);
			System.out.println("\n2등 보너스 번호 : "+bonus);
		}

		void findMy(int[] my) {
			boolean contain;
			int cnt = 7;
			
			for (int i = 0; i <my.length;i++) {
				contain = win.contains(my[i]);
				if(contain) 
					cnt--;
			}
				
			if(cnt == 2 && my[my.length-1] != bonus) 
				cnt ++;
			if (cnt < 6)
				System.out.println(cnt+ "등 당첨!");
			else 
				System.out.println("꽝!");
			
			System.out.print("몇등경우의 수를 보시겠습니까? :");
			menu = sc.nextInt();
			print(menu);
		}
		
		void print(int n) {
			switch(n) {
			case 1:{
				System.out.println(win);
				break;
			}
			case 2:{
				for (int i = 0; i < win.size(); i++) {
					int num = 0;
					it = win.iterator();
					while (it.hasNext()) {
						if (num == i) {
							System.out.print(bonus + " ");
							it.next();
						} else {
							System.out.print(it.next() + " ");
						}
						num++;
					}
					System.out.println();
				}
				break;
			}
			case 3:{
				for (int i = 0; i < win.size(); i++) {
					int num = 0;
					it = win.iterator();
					while (it.hasNext()) {
						if (num == i) {
							System.out.print("X" + " ");
							it.next();
						} else {
							System.out.print(it.next() + " ");
						}
						num++;
					}
					System.out.println();
				}
				break;
			}
			case 4:{
				for(int i = 0; i < win.size(); i++) {
					for (int j = i+1; j < win.size(); j++) {
						int num1 = 0;
						int num2 = 0;
						it = win.iterator();
						while (it.hasNext()) {
							if (num1 == j) {
								System.out.print("X" + " ");
								it.next();
							}
							else if(num2 == i){
								System.out.print("X" + " ");
								it.next();
							}
							else {
								System.out.print(it.next() + " ");
							}
							num1++;
							num2++;
						}
						System.out.println();
					}
				}
				break;
			}
			case 5:{
				for(int i = 0; i < win.size(); i++) {
					for(int j = i+1; j < win.size(); j++) {
						for(int k = j+1;k < win.size();k++) {
							int num1 = 0;
							int num2 = 0;
							int num3 = 0;
							it = win.iterator();
							while (it.hasNext()) {
								if (num1 == k) {
									System.out.print("X" + " ");
									it.next();
								}
								else if(num2 == j){
									System.out.print("X" + " ");
									it.next();
								}
								else if(num3 == i){
									System.out.print("X" + " ");
									it.next();
								}
								else {
									System.out.print(it.next() + " ");
								}
								num1++;
								num2++;
								num3++;
							}
							System.out.println();
						}
					}
				}
				break;
			}
		}
			
	}
}