Cleaner Code: Using JDK Class

char str[] = s.toCharArray();
int[] set = new int[256];
Arrays.fill(set, -1);

System.out.println(Arrays.toString(array));

or if your array contains other arrays as elements:

System.out.println(Arrays.deepToString(array));

Arrays.fill(array, 1.0);
Collections.sort(intervals, new IntervalComparator());