调整数组顺序使奇数位于偶数前面，且奇数之间、偶数之间的相对位置不变

public class Solution {
    public void reOrderArray(int [] array) {
        int len = array.length;
        int[] arr = new int[len];
        int start = 0;
        int end = len - 1;
        for (int i = 0; i < len; ++i) {
            if ((array[i] & 1) == 1) {
                arr[start++] = array[i];
            }
            if ((array[len - 1 - i] & 1) == 0) {
                arr[end--] = array[len - 1 - i];
            }
        }
        for (int i = 0; i < len; ++i) {
            array[i] = arr[i];
        }
    }
}