How to implement Hill sorting algorithm using java

How to use Java to implement Hill sorting algorithm

Hill sorting is an improved insertion sort algorithm that improves efficiency by splitting the array into multiple subsequences . This article will introduce how to implement the Hill sorting algorithm using Java language, and attach specific code examples.

1. Algorithm Principle
   The basic idea of ​​Hill sorting is to divide the array to be sorted into several subsequences, perform insertion sorting on each subsequence, and then gradually reduce the interval of the subsequences and continue. Sort until the entire array becomes a sequence.
2. Java implementation

public class ShellSort {
    public static void shellSort(int[] arr) {
        int n = arr.length;

        // 初始化列数
        int gap = n / 2;

        while (gap > 0) {
            for (int i = gap; i < n; i++) {
                int temp = arr[i];
                int j = i;

                // 插入排序
                while (j >= gap && arr[j - gap] > temp) {
                    arr[j] = arr[j - gap];
                    j -= gap;
                }
                arr[j] = temp;
            }
            gap /= 2;
        }
    }

    public static void main(String[] args) {
        int[] arr = {9, 8, 3, 7, 5, 6, 4, 2, 1};

        System.out.println("排序前数组：");
        printArray(arr);

        shellSort(arr);

        System.out.println("排序后数组：");
        printArray(arr);
    }

    public static void printArray(int[] arr) {
        for (int i : arr) {
            System.out.print(i + " ");
        }
        System.out.println();
    }
}

3. Test
   In the above code, we first define a shellSort method to implement Hill sorting . Then in the main method, we create an array arr to be sorted and call the shellSort method to sort it. Finally, we print the sorted array using the printArray method.

Run the code, the console will output the following results:

排序前数组：
9 8 3 7 5 6 4 2 1 
排序后数组：
1 2 3 4 5 6 7 8 9

Through the above code example, we can clearly see the execution process of the Hill sorting algorithm. By continuously reducing the interval between subsequences, the efficiency of sorting can be improved, allowing the array to be sorted faster.

Summary
This article introduces how to use Java to implement the Hill sorting algorithm. Hill sorting improves sorting efficiency by dividing the array into multiple subsequences and performing insertion sort on each subsequence. By understanding the principles of the Hill sorting algorithm and the corresponding code implementation, we can better understand the algorithm and be able to flexibly apply it to actual sorting problems.

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