问在Java中生成N的倍数增加的随机数

EN

static final Random random = new Random(System.currentTimeMillis());

public int random(int range, int multiple) {
    int value = random.nextInt(range / multiple) * multiple;
    return value == 0 ? 1 : value;
}

new Random().nextInt(7) * 5; // will generate a number between 0 and 7 not included then multiply by 5 which should give what you want

public static void main(String[] args){
    int N = 50;
    int M = 5;
    System.out.println(getRandomNumber(N, M));

}

static int getRandomNumber(int n, int m){
    Random r = new Random();
    int rnd = r.nextInt(n);
    return rnd%m == 0?rnd:getRandomNumber(n, m);
}