Java：彩票号码产生器

package ChongXingZuo;


public class CaiPiaoChanSheng {

	public static void main(String[] args) {
		int[] arr = new int[6];
		int backCheck = 0;	//反向检查
		boolean repeat = false;
		for (int i = 0; i < 6; i++) {
			arr[i] = (int) (Math.random() * 100);	//产生取值范围为100以内的随机数
			backCheck = i - 1;
			repeat = false;
			while (i >0 && backCheck >=0) {		//arr先跑，backChark后面追
				if (arr[i] == arr[backCheck]) {
					i--;
					repeat = true;
					break;
				}
				backCheck--;
			}
			if (!repeat) {
				System.out.println("第" + (i + 1) + "张彩票产生的号码为：" + arr[i]);
			}
		}
	}

}