Java 排序（转）_JAVA_编程开发_程序员俱乐部

?排序

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class="java" name="code">public class Sort {   
  
    public long[] array;   
  
    //冒泡排序   
    public void bublingSort(long[] array) {   
        int length = array.length;   
        long temp;   
        for (int i = length; i > 0; i--) {   
            for (int j = 0; j < i - 1; j++) {   
                if (array[j] > array[j + 1]) {   
                    temp = array[j + 1];   
                    array[j + 1] = array[j];   
                    array[j] = temp;   
                }   
            }   
        }   
    }   
  
    //选择排序   
    public void selectSort(long[] array) {   
        int length = array.length;   
        int k = 0;   
        long temp;   
        for (int i = length; i > 0; i--) {   
            k = 0;   
            for (int j = 0; j < i - 1; j++) {   
                if (array[k] < array[j + 1]) {   
                    k = j + 1;   
                }   
                if (j == i - 2) {   
                    temp = array[j + 1];   
                    array[j + 1] = array[k];   
                    array[k] = temp;   
                }   
            }   
        }   
    }   
  
    //插入排序   
    public void insertSort(long[] array) {   
        int length = array.length;   
        int in = 0;   
        long temp;   
        for (int i = 1; i < length; i++) {   
            for (int j = 0; j < i; j++) {   
                if (array[i] < array[j]) {   
                    in = j;   
                    temp = array[i];   
                    while (j < i) {   
                        array[i] = array[i - 1];   
                        i--;   
                    }   
                    array[in] = temp;   
                }   
            }   
        }   
    }   
  
    //希尔排序   
    public void sortArray(long[] array, int d) {   
        int length = array.length;   
        long temp;   
        for (int i = 0; i < d; i++) {   
            for (int j = i + d; j < length; j += d) {   
                temp = array[j];   
                for (int k = i; k < j; k += d) {   
                    if (array[j] < array[k]) {   
                        int m = j;   
                        while (m > k) {   
                            array[m] = array[m - d];   
                            m = m - d;   
                        }   
                        array[k] = temp;   
                    }   
                }   
            }   
  
        }   
    }   
  
    public void shellSort(long[] array) {   
        int length = array.length;   
        int d = 1;   
        do {   
            d = getIncrement(length);   
            sortArray(array, d);   
        } while (d > 1);   
    }   
  
    //快速排序   
    public void recQuickSort(int left, int right) {   
        if (right - left <= 0) {   
            return;   
        } else {   
            long pivot = array[right];   
            int partition = partition(left, right, pivot);   
            recQuickSort(left, partition - 1);   
            recQuickSort(partition + 1, right);   
        }   
    }   
  
    public int partition(int left, int right, long pivot) {   
        int leftPst = left - 1;   
        int rightPst = right;   
        while (true) {   
            while (array[++leftPst] < pivot)   
                ;   
            while (rightPst > left && array[--rightPst] >= pivot)   
                ;   
            if (leftPst < rightPst) {   
                swap(leftPst, rightPst);   
            } else {   
                break;   
            }   
        }   
        swap(leftPst, right);   
        return leftPst;   
    }   
  
    public void swap(int left, int right) {   
        long temp = array[left];   
        array[left] = array[right];   
        array[right] = temp;   
    }   
  
    //归并排序   
    public void mergeSort(long array[], int left, int right) {   
        long[] temp = new long[array.length];   
        sort2(array, temp, left, right);   
    }   
  
    public void sort2(long[] array, long[] temp, int left, int right) {   
        if (left >= right)   
            return;   
        int mid = (left + right) / 2;   
        sort2(array, temp, left, mid);   
        sort2(array, temp, mid + 1, right);   
  
        int leftPst = left;   
        int rightPst = mid + 1;   
        int position = left;   
        while (leftPst <= mid && rightPst <= right) {   
            if (array[leftPst] <= array[rightPst]) {   
                temp[position++] = array[leftPst];   
                leftPst++;   
            } else {   
                temp[position++] = array[rightPst];   
                rightPst++;   
            }   
        }   
  
        while (rightPst <= right) {   
            temp[position++] = array[rightPst];   
            rightPst++;   
        }   
        while (leftPst <= mid) {   
            temp[position++] = array[leftPst];   
            leftPst++;   
        }   
        System.arraycopy(temp, left, array, left, right - left + 1);   
    }   
  
    public int getIncrement(int d) {   
        int r = 1;   
        r = r / 3 + 1;   
        return r;   
    }   
  
    public void swap(long a, long b) {   
        long temp = a;   
        a = b;   
        b = temp;   
    }   
  
    public void display(long[] array) {   
        for (int i = 0; i < array.length; i++) {   
            System.out.print(array[i] + " ");   
        }   
    }   
  
    public static void main(String[] args) {   
        long[] array = { 4, 2, 3, 1, 9, 445, 56, 345, 2, 4354, 67, 23, 56, 234, 678, 3, 1, 7, 90,   
                43 };   
        long[] test = {1, 5, 10 ,15, 35, 56, 100, 4, 6, 8, 35, 66, 300, 500};   
        Sort sort = new Sort();   
        sort.mergeSort(array, 0, array.length - 1);   
        sort.display(array);   
    }   
}  

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