学步园

继续上图和代码

package com.lyj.sort;

public class ShellSort {

    /**
     * @param args
     */
    public static void main(String[] args) {
        int[] array = { 76, 81, 60, 22, 98, 33, 12, 1, 19 };

        // 排序前
        System.out.print("排序前:     ");
        for (int i : array) {
            System.out.print(i + " ");
        }
        System.out.println();

        // 排序
        shellSort(array);

        // 排序后
        System.out.print("排序后:     ");
        for (int i : array) {
            System.out.print(i + " ");
        }
    }

    private static void shellSort(int[] array) {
        int d = array.length;
        while ((d = d / 2) != 0) {
            for (int i = 0; i < d; i++) {  // 按增量d分组
                int h = i;

                // 以下相当于插入排序
                for (int j = 0; j < (array.length / d) - 1; j++) { // 每组数据的数量
                    for (int k = h; k >= 0; k--) {           // 排序
                        if (array[k] > array[k + d]) {
                            int temp = array[k];
                            array[k] = array[k + d];
                            array[k + d] = temp;
                        }
                    }
                    h = h + d;
                }
            }
            System.out.print("增量d=" + d + "的排序    ");
            for (int in : array) {
                System.out.print(in + " ");
            }
            System.out.println();
        }
    }

}