choose unique random numbers with specific range

Question

my problem is I want my program to make four unique random choices in range of numbers between 0 to 3 I tried to do it in random class but I could not, , if you could help by co

Answer 1

You could fill an (if you don't need too many numbers) ArrayList with numbers ranging from 0 - 3. Then you get a random index using Random.nextInt(list.size()), get the number from the list and removeAt the entry at your index.