java的希尔排序代码怎么写?

Java中希尔排序的代码如下：public static void shellSort(int[] arr) {
int gap = arr.length / 2;
while (gap > 0) {
for (int i = gap; i < arr.length; i++) {
int j = i;
int temp = arr[i];
while (j >= gap && arr[j - gap] > temp) {
arr[j] = arr[j - gap];
j = j - gap;
}
arr[j] = temp;
}
gap /= 2;
}
}

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Java 希尔排序代码

Sure, I can provide you with a Java implementation of the shell sort algorithm. Here is an example:

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

    // Start with a big gap, then reduce the gap
    for (int gap = n / 2; gap > 0; gap /= 2) {
        // Do a gapped insertion sort for this gap size.
        // The first gap elements a[0..gap-1] are already in gapped order
        // Keep adding one more element until the entire array is gap sorted
        for (int i = gap; i < n; i++) {
            // add arr[i] to the elements that have been gap sorted
            // save arr[i] in temp and make a hole at position i
            int temp = arr[i];

            // shift earlier gap-sorted elements up until the correct location for arr[i] is found
            int j;
            for (j = i; j >= gap && arr[j - gap] > temp; j -= gap) {
                arr[j] = arr[j - gap];
            }

            // put temp (the original arr[i]) in its correct location
            arr[j] = temp;
        }
    }
}

Please note that this implementation assumes an array of integers (int[]) as input.

Java希尔排序代码

以下是Java希尔排序的代码：

package totoSort;
import java.util.Arrays;

public class ShellSort {
    public static void main(String[] args) {
        int[] arrays = new int[] {1, 5, 2, 3, 6, 9, 4, 0, 1};
        
        // 实现增量的变化
        for(int gap = arrays.length / 2; gap > 0; gap /= 2) {
            for(int i = gap; i < arrays.length; i++) {
                for(int j = i - gap; j >= 0; j -= gap) {
                    if(arrays[j > arrays[j + gap]) {
                        int temp = arrays[j];
                        arrays[j = arrays[j + gap];
                        arrays[j + gap = temp;
                    }
                }
            }
        }
        
        System.out.println(Arrays.toString(arrays));
    }
}

这段代码使用希尔排序对一个整数数组进行排序。希尔排序的核心思想是按照一定的增量分组，对每组使用直接插入排序算法进行排序，随着增量的逐渐减少，每组包含的关键词越来越多，当增量减至1时，整个序列被分为一组，算法终止。

在这个代码中，首先定义了一个增量`gap`，初始值为数组长度的一半。然后通过不断将`gap`除以2来缩小增量。接着使用嵌套的循环进行排序，外层循环控制增量的变化，内层循环进行插入排序。最后输出排序后的数组。

这种实现方式是希尔排序的一种常见实现方法，其中增量序列{gap=n/2,(n/2)/2,...,1}被称为希尔增量。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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