In java, what I should do the create an array with half of data is 0s, half 1s? And what I should do to use Randomize (shuffle) the contents of the array
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7Start by building array, adding 50% as `0` and 50% as `1`. Then use `Collections.asList` and `Collections.shuffle` to randomise it – MadProgrammer Feb 15 '18 at 23:48
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2Do you mean *exactly* **half** of 0s and 1s? – zlakad Feb 15 '18 at 23:48
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Integer[] arr = new Integer[100];
Arrays.fill(arr, 0, 50, 0);
Arrays.fill(arr, 50, 100, 1);
List<Integer> list = Arrays.asList(arr);
Collections.shuffle(list); //list is now in random order
If you want to avoid using a Integer and List for the sake of Collections.shuffle(), you'd need to implement the shuffling yourself. See this question for that.
Malt
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Try this.
int size = 100;
List<Integer> list = IntStream.range(0, size).mapToObj(x -> x).collect(Collectors.toList());
Collections.shuffle(list);
int[] result = list.stream().mapToInt(x -> x % 2).toArray();