冒泡排序算法

 

import java.util.Random;

/**
 * Copyright 2015年5月2日 by 
 *
 * All Rights Reserved
 *
 * @Package 
 * @Title: BubbleSort.java
 * @author 
 * @date 2015年5月2日 上午9:53:17
 */
public class BubbleSort
{
    public static void main(String arg[])
    {
	int k = 0;
	while (k < 10000)
	{
	    BubbleSort bubbleSort = new BubbleSort();
	    int[] sortedArray = bubbleSort.createIntArrays(new Random(), 10);
	    // int[] sortedArray={783621832 ,-86041034
	    // ,1575632393,-625778470};//1575632393, 2064581627, -625778470
	    // ,1512449990 ,770640410 ,-1231559618};
	    System.out.println("\n 排序前的数组：");
	    bubbleSort.printArray(sortedArray);
	    int[] haveSoredArray = bubbleSort.sort(sortedArray);
	    System.out.println("\n 排序后的数组：");
	    bubbleSort.printArray(haveSoredArray);
	    if (bubbleSort.isSortedArray(haveSoredArray))
	    {
		System.out.println("\n 排序算法正确");
	    }
	    else
	    {
		System.err.println("\n 排序算法错误");
	    }
	    k++;
	}

    }

    private int[] sort(int[] sortedArray)
    {
	if (sortedArray == null || sortedArray.length <= 1)
	{
	    return sortedArray;
	}
	for (int index = 0, step = 0; step < sortedArray.length - index; index++)
	{
	    int max = sortedArray[0];
	    for (int nextIndex = 1; nextIndex < sortedArray.length - index; nextIndex++)
	    {
		int nextIndexValue = sortedArray[nextIndex];

		if (max > nextIndexValue)
		{
		    int temp = max;
		    sortedArray[nextIndex - 1] = nextIndexValue;
		    sortedArray[nextIndex] = temp;
		}
		else
		{
		    max = nextIndexValue;
		}

	    }

	}
	return sortedArray;
    }

    private boolean isSortedArray(int[] test)
    {
	int i = 0;
	int j = 1;
	while (j < test.length)
	{
	    if (test[i] > test[j])
	    {
		System.out.println("\n 前一个值：" + test[i] + "大于" + "后一个值："
			+ test[j]);
		return false;
	    }
	    i++;
	    j++;
	}
	return true;
    }

    private int[] createIntArrays(Random random, int size)
    {
	int[] intArray = new int[size];
	for (int i = 0; i < intArray.length; i++)
	{
	    intArray[i] = random.nextInt();
	}
	return intArray;

    }

    private void printArray(int[] t)
    {
	System.out.println("array size is: " + t.length + " values are:");
	for (int i : t)
	{
	    System.out.print(i + " ");
	}
    }

}