Put all the even numbers in the first half, and put all the odd numbers in the second half of the array
public static void func(int[] array){ int i = 0; int j = array.length - 1; while(i <j){ while(i < j && array[i] % 2 == 0){ i++; } while (i < j && array[j] % 2 != 0){ j--; } int tmp = array[i]; array[i] = array[j]; array[j] = tmp; } } public static void main(String[] args) { int[] array = {1,4,3,6,8,5,9}; func(array); System.out.println(Arrays.toString(array)); }
Print the result:
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