[JAVA] Output in multiples of 3

8/11 postscript ・ 3/0 is an error (ArithmeticException), but 0/3 is not an error

Basic rule: Multiples of 3 have "!!"

  1. Output the entered numerical values in order from 1.
  2. Output 1 in reverse
  3. Output 15 random numbers


import java.util.Random;
import java.util.Scanner;

public class Nabeatsu {

	public static void main(String[] args) {
		//Be stupid by multiples of 3
		Scanner scan = new Scanner(System.in);
		int number = scan.nextInt();
		for(int i = 1;i <= number; i++) {
			if(i % 3 == 0) 
				System.out.println(i + "!!");	
		for(int i = number;i > 0; i--) {  //In reverse order
			if(i % 3 == 0) 
				System.out.println(i + "!!");	

		Random random = new Random();
		int i = 0;
		while(i<15) {
			int ran = random.nextInt(500);
			if(ran % 3 == 0) {
				System.out.println(ran+ "!!");	
			}else {


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