Thread: Optimize/Improvements/Suggestions for my code

Hi Everyone,
New here and picking up Java little by little. I just finished writing a SuperLotto program and it works fine, but feel like the code can be improve upon. Any suggestions, tips, etc... on what I can do to improve on my code would be appreciated!

I tried using a standard array,
int ballNumbers = new int[6];
since I know I don't need anything more then 6 balls #, but when I did that, I couldn't use ballNumber.contains().

Thanks in advance!

import java.util.*;
 
class Lotto {
 
	public static void main(String[] args) {
 
		Scanner input = new Scanner(System.in);
 
		Random lottoBall = new Random();
 
		int play,			// # of quick pick ticket player wants to purchase
			count=0,		// once count == play, exit program
			number,			// variable to hold the random number between 1-47
			ballCount=0;	// SuperLotto has 6 balls total + Mega Number
 
		ArrayList<Integer> ballNumbers = new ArrayList<Integer>(); // array to hold each ball #
 
		System.out.print("Enter # of plays: ");
		play = input.nextInt();
 
		while(count<play) {
			while(ballCount < 6) {
				number = 1+lottoBall.nextInt(47);
 
				// check for duplicate numbers
				if(!ballNumbers.contains(number)) {
					ballNumbers.add(number);
					ballCount++;
				}
			}
 
			// sort array
			Collections.sort(ballNumbers);
 
			// display array content
			for(int i=0; i<ballNumbers.size();i++)
				System.out.print(ballNumbers.get(i) + " ");
 
			// clear array
			ballNumbers.clear();
 
			// display Mega Number ball #
			System.out.printf("\nMega Number: %d\n\n", 1+lottoBall.nextInt(27));
 
			ballCount = 0;
			count++;
		}		
	}
}