考虑以下JAVA排序代码,对于array为{15,0,6,9,3}时,运行sort方法,则最终排序结果为:
public void sort(Comparable[] a) {
int N = a.length;
int h = 1;
while (h < N / 3) {
h = 3 * h + 1;// 1, 4, 13, 40, ...
}
while (h >= 1) {
for (int i = h; i < N; i++) {
for (int j = i; j >= h && compareElement(a[j], a[j - h]); j -= h) {
exch(a, j, j - h);
}
}
h = h / 3;
}
}
public boolean compareElement(Comparable v, Comparable w) {
return v.compareTo(w) < 0;
}
public static void exch(Comparable[] a, int i, int j) {
Comparable t = a[i];
a[i] = a[j];
a[j] = t;
}