Question

can anyone please tell me how to generate random numbers with no repeat
example

random (10) should(may) return 3,4,2,1,7,6,5,8,9,10 with no repeat

Thanks

Answer 1

I would suggest adding the numbers to an ArrayList<Integer> and then use Collections.shuffle() to randomize their order. Something like this:

ArrayList<Integer> number = new ArrayList<Integer>();
for (int i = 1; i <= 10; ++i) number.add(i);
Collections.shuffle(number);