How to change one value equal to another in an int array in java?

Question

Closed. This question needs debugging details. It is not currently accepting answers. question from:https://stackoverflow.com/questions/65871987/how-to-change-one-value-equal-to-another-in-an-int-array-in-java

Answer 1

Try this.

• Generate a List of the numbers from 1 to 34. (or whatever your range is).

List<Integer> list = new ArrayList<>();
for (int i = 1; i <= 34; i++) {
  list.add(i);
}

• then call Collections.shuffle() on the list.

Collections.shuffle(list);

• then just take the first 6 (or however many) numbers. They will be random and unique.

for (int i = 0; i < 6; i++) {
   System.out.println(list.get(i));
}

EDIT

You can pass the starting and ending numbers or leave them out and hard code them in the method.

public static List<Integer> lottery(int start, int end) {
    List<Integer> nums = new ArrayList<>();
    for (int i = start; i <= end; i++) {
        nums.add(i);
    }
    Collections.shuffle(nums);
    return nums;
}

// e.g.
List<Integer> vals = lottery(1,34);