Java实现 希尔排序

package net.okren.java.sort;
import java.util.*;
public class ShellSort {
	
	public static void shellSort(Comparable[] data){
		int j;
		for(int gap = data.length / 2; gap > 0; gap /= 2){
			for(int i = gap; i < data.length; i++){
				Comparable temp = data[i];
				for(j = i; j >= gap && temp.compareTo(data[j - gap]) < 0; j -= gap){
					data[j] = data[j - gap];
				}
				
				data[j] = temp;
			}
		}
	}
	
	public static void main(String[] args){
		Random r = new Random();
		Comparable[] data = new Comparable[20];
		for(int i = 0; i < data.length; i++){
			data[i] = r.nextInt(data.length);
		}
		
		for(int i = 0; i < data.length; i++)
			System.out.print(data[i] + " ");
		
		shellSort(data);
		System.out.println();
		
		for(int i = 0; i < data.length; i++)
			System.out.print(data[i] + " ");
	}

}